How to Wash Cleats: Safe Cleaning Guide

If you are wondering how to wash cleats, the answer is never a washing machine. Throwing muddy soccer, baseball, or football boots into a standard spin cycle is the fastest way to destroy a $300 investment. As a textile scientist and professional dry cleaner, I see ruined athletic footwear cross my counter every single season-soleplates peeling off, natural leather stiff and cracked, and expensive knit uppers permanently stained with brown clay.

Standard lifestyle blogs will tell you to scrub them with warm water and soap. That advice will ruin high-performance gear. This guide details exactly how to clean synthetic, knit, and genuine leather cleats without degrading the specialized adhesives, technical textiles, or carbon fiber plates that keep you fast on the field.

To wash cleats safely, brush off dry mud, then hand-wash the upper using a soft brush and a cool water (under 30°C/86°F) solution of mild non-ionic surfactant. Never machine-wash or tumble-dry, as heat degrades soleplate adhesives (causing delamination) and warps TPU or carbon fiber plates. Air-dry at room temperature with crumpled newspaper.

The Science of Cleat Materials & Degradation

Athletic cleats are highly engineered pieces of equipment. Comparing them to casual canvas sneakers is a mistake; if you need to wash standard lifestyle canvas, follow my wash Hey Dude shoes protocol. Cleats require a strict, chemistry-first approach because cleaning them incorrectly triggers immediate structural breakdown.

Understanding Your Cleat’s Anatomy

• The Upper Material: Modern boots use Kangaroo Leather (K-leather) for a pliable touch, Polyurethane (PU) synthetic leather for waterproof durability, or warp-knit polyesters (like Nike Flyknit or Adidas Primeknit) for a lightweight, sock-like fit.
• The Soleplate: Constructed from stiff Thermoplastic Polyurethane (TPU) or carbon fiber composites to maximize kinetic energy return into the ground.
• The Bond: The upper and soleplate are bonded together using heat-sensitive cyanoacrylate or polyurethane adhesives.

The Danger of Heat & Water (Adhesive Hydrolysis)

Exposing cleats to water temperatures above 40°C (104°F) or placing them near heat sources like radiators causes massive structural failures. High temperatures reach the glass transition temperature (T_g) of certain TPU polymers, permanently warping the plastic plate.

Worse, hot water induces adhesive hydrolysis. The heat softens the polyurethane glue, causing the soleplate to peel away from the upper, leaving a slick, gummy residue that can never be rebonded at home. Soaking synthetic uppers in water for extended periods breaks down the polymer chains, leading to peeling and a complete loss of tensile strength.

The Microbiology of "Cleat Stink"

The pungent, sour odor of used cleats is not just sweat-it is an active bacterial colony. Sweat contains urea ($\ce{CH4N2O}$), lipids, and lactic acid ($\ce{C3H6O3}$). In the dark, damp environment of a sports bag, anaerobic bacteria like Brevibacterium linens and Staphylococcus epidermidis feed on these compounds. They produce volatile sulfur compounds and isovaleric acid, generating that classic cheesy, foul smell. Spraying perfume over this colony does not work; the bacteria must be chemically sanitized.

Cleat Material Care Protocol

Before you begin mixing cleaning solutions, identify the primary material of your boot. Use this matrix to select safe tools and avoid chemical damage.

Step-by-Step Cleat Restoration Process (The 7-Step Method)

Follow this chronological, hand-wash-only process to clean, deodorize, and preserve your athletic footwear.

Step 1: The Dry Mud Extraction

Wet clay contains sub-2-micron particles. If you wipe caked clay while it is wet, you create a liquid slurry, forcing microscopic pigments deep into knit fabrics and synthetic pores. This causes permanent brown staining.

Allow the mud to dry completely. Tap the soleplates together to knock loose heavy chunks. Use a wooden tongue depressor or a Tampico fiber brush to gently flake off the remaining dried dirt.

Step 2: Component Disassembly

Pull out the laces and the Ethylene-Vinyl Acetate (EVA) foam insoles.

Thread the laces into a mesh wash bag and machine-wash them with your standard laundry using a heavy-duty detergent containing optical brighteners. Set the EVA insoles aside. Similar to the delicate wool insoles outlined in our wash Allbirds guide, you must never submerge raw foam, as water degrades its cellular cushion and arch support.

Step 3: Soleplate Deep Clean

Mix 2 cups (470ml) of cool water (under 30°C/86°F) with 1 teaspoon (5ml) of non-ionic dish soap. Dip a medium-stiff nylon brush into the solution and aggressively scrub the plastic studs, metal threads, and soleplate. Pay close attention to the tight angles around the stud wells where dried turf and dirt collect. Wipe the muddy runoff away with a damp microfiber cloth.

Step 4: Upper Surface De-soiling

The upper material dictates your mechanical action.

For Synthetics and Knits, dip a soft microfiber cloth into your soapy water solution. Gently work in circular motions across the toe box and side panels. If you are cleaning a full knit boot, refer to our how to wash polyester guide for detailed rules on preventing synthetic snagging.

For K-Leather, use a dedicated, pH-neutral saddle soap. Avoid over-wetting the leather. Excess moisture causes natural hide fibers to swell, stiffen, and inevitably crack upon drying.

Step 5: Targeted Stain Spot-Treatment

If your cleats have organic grass or blood stains on the fabric collar, apply a single drop of liquid laundry detergent containing protease enzymes directly to the stain.

Protease enzymes act as biological catalysts. They specifically target and sever the peptide bonds in protein-based stains (like grass chlorophyll and blood hemoglobin), lifting them from synthetic fibers without harsh scrubbing. Gently agitate the drop of detergent with a soft toothbrush for 60 seconds, then wipe clean with a damp cloth.

Step 6: Disinfection and Deodorization

To eliminate Brevibacterium and neutralize odor, you must attack the chemistry of the shoe's interior.

Lightly mist the inside fabric lining with a 70% Isopropyl Alcohol ($\ce{C3H8O}$) dilution. The alcohol penetrates the bacterial cell walls, coagulating their proteins and sanitizing the damp toe box.

Next, dust the extracted EVA insoles with baking soda ($\ce{NaHCO3}$). Baking soda acts as an amphoteric deodorizer, meaning it chemically reacts with the acidic lactic acid in sweat to neutralize it into odorless salts, water, and carbon dioxide gas. The reaction looks like this:

$$\ce{NaHCO3 + C3H6O3 -> NaC3H5O3 + H2O + CO2^}$$

Let the baking soda sit on the insoles for a few hours, then shake off the excess powder before reinserting them.

Step 7: Structural Moisture Extraction & Drying

Check the Care Label: If the manufacturer states 'Do Not Tumble Dry', respect it. High heat destroys footwear. Never use a clothes dryer, hair dryer, radiator, or direct sunlight to speed up the process.

Pack the inside of the damp cleats tightly with crumpled, unprinted white paper towels or standard newspaper. This physical wicking action extracts moisture from the inside out while maintaining the shoe's structural shape, preventing the rigid heel counter from collapsing inward.

For premium leather cleats, insert cedar shoe trees once the initial surface moisture is absorbed. Raw cedar naturally wicks away remaining dampness while releasing aromatic compounds that keep the leather structured and fresh.

Laundry Lab Pro-Tips & Mistakes to Avoid

Pro-Tips:

• K-Leather Hydrophobic Maintenance: Natural leather loses its oils during play and cleaning. Once dry, apply a thin, even coat of a lanolin-based leather conditioner or mink oil. This restores the lipid barrier, keeping the leather soft, supple, and naturally water-resistant for your next match.
• The Box Fan Trick: If you have a tournament tomorrow and need dry gear fast, place the paper-packed cleats directly in front of a standard household box fan. The continuous, room-temperature airflow accelerates evaporation safely without softening the soleplate adhesives.

Critical Mistakes to Avoid:

• Do Not Use Chlorine Bleach: Applying liquid chlorine bleach ($\ce{NaClO}$) oxidizes the protective polyurethane coatings on synthetic boots. This chemical burn turns white cleats a permanent, unfixable yellow and weakens the tensile strength of the synthetic knits holding your foot in place.
• Do Not Submerge Your Cleats: Immersing the entire shoe in a bucket of soapy water saturates the internal foam midsole and lining. This causes prolonged drying times that invite fungal growth (like athlete's foot pathogens) and guarantees internal adhesive failure.
• Do Not Use Wire Brushes: Heavy-duty steel or brass wire brushes will severely scratch and compromise the waterproof outer membrane of synthetic uppers. Stick to horsehair or soft nylon.

Frequently Asked Questions

Can I put synthetic cleats in the washing machine on a cold, gentle cycle? No. Even on a cold cycle, the mechanical shear forces of rotational agitation will fray engineered knits, weaken bonded seams, and can easily snap rigid carbon-fiber shank plates. Always hand-wash athletic footwear.

How can I restore white knit cleats that have turned yellow from clay? Mix an oxygen-based bleach powder ($\ce{2Na2CO3.3H2O2}$) with cool water to create a thick paste. Apply the paste to the stained knit sections, let it sit for 15 minutes, gently agitate with a soft brush, and wipe clean.

Is it safe to pour baking soda directly inside my leather cleats? Use baking soda sparingly on natural leather. Sodium bicarbonate is highly alkaline and will rapidly strip natural oils from the inner hide, leading to premature desiccation and cracking. Only apply it directly to the removable foam insoles.