Said It Here

How to wash an old sentimental baseball cap without ruining it

Soaking heavily soiled or moldy hats can permanently warp their shape and leave behind sticky sweatband rings or discoloration. This prevents people from safely restoring sentimental caps without ruining the fabric.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Soaking in water and dish soap
  2. 2
    Running it through the dishwasher
  3. 3
    Scrubbing with a stiff bristle brush or toothbrush
  4. 4
    Using laundry detergent, OxiClean, or vinegar soak
  5. 5
    Washing in the regular washing machine
  6. 6
    Washing hats in the dishwasher with regular dishwasher detergent
  7. 7
    Throwing the hat into the washing machine with the rest of clothes
  8. 8
    Using a hat cage in the washing machine
  9. 9
    Spraying with stain remover, using a soft brush, washing in the sink with detergent, and using hydrogen peroxide for stubborn stains

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/CleaningTips2 people · September 2026

Finally went to wear it again, and realized I had *never* washed it. I soaked it in a bucket with water and dish soap for a couple of days, and this white ring around the sweat band appeared.source ↗

Now the ring is extra sticky, and I’m thinking it’s moldsource ↗

It’s a sentimental hat, so I’d like to clean and keep it if there’s a reasonable solution…but it’s also just a hat.source ↗

R_FireJohnson · r/CleaningTips · 2 upvotes

This hat hadn’t been worn in a while. How to go about cleaning this orange stain off? Thanks!source ↗

Significant-Egg-6297 · r/CleaningTips · 1 upvotes

Where this came up

People with this problem also raised