Why most caps get ruined in the wash

Baseball caps are built from cotton or cotton-poly blends with a shaped brim. Agitation, heat, and twisting can warp that shape and cause shrinking or sweat-stain rings. The good news: with a little prep (and the right holder) you can get a clean cap that still looks crisp.

Three safe ways to clean a baseball cap

Method 1: Cap cage + washing machine (our favorite)

1. Pre-treat sweat bands with a gentle stain remover or a mix of mild detergent + water. Brush lightly with a soft toothbrush.
2. Place the cap in a rigid cap holder so the crown and brim keep their shape.
3. Use cold water, delicate cycle, and a small amount of detergent. Avoid bleach.
4. Air dry only. Shape the brim as it dries. No dryer, no high heat.

Grab a holder here → 3 Pack Hat Washer

Method 2: Hand-wash (best for vintage or wool)

1. Fill a sink with cool water + a teaspoon of gentle detergent.
2. Submerge, swirl for 10 minutes, spot-clean the sweat band.
3. Rinse cool, press water out with a towel (don’t wring), then air dry on a rounded object.

Method 3: Quick refresh (no full wash)

• Mix 1 cup water + 1 tbsp white vinegar. Lightly mist the sweat band and inner crown.
• Blot with a clean towel and air dry. Great for in-between deep cleans.

What not to do

• No hot water or dryers. Heat shrinks and warps.
• No bleach on colored caps. It can yellow stitching.
• Dishwasher? It’s hit-or-miss because the water can get hot. If you try it, use the top rack, cold/air-dry, and still use a cap holder.

Stain cheatsheet

• Sweat rings: paste of baking soda + water, brush gently, then rinse.
• Grass: dab rubbing alcohol on a cloth, then wash.
• Makeup/sunscreen: a drop of dish soap on a damp cloth, blot, then rinse.

Keep it fresh longer

• Let caps dry fully between wears.
• Use a deodorizing spray on the sweat band after hot days.
• Store on a hook or in a cage so the crown doesn’t collapse.

Recommended gear

Cap/hat washer cage – keeps shape through the wash. Great for baseball caps, golf hats, and truckers.

The Perfect Part ships fast and stands behind every order. Need help picking a hat washer? Contact us—we’re happy to help.