Only hand wash your wool hat!
Use hand-hot water with a little squirt of washing-up liquid in a bowl, sink or bucket. It’s best to wash your hat on its own in case any of the dye runs.
Gently agitate it so that the water is absorbed into the hat.
Leave the hat in the soapy water for 10-15 minutes to allow the dirt to soak out.
Remove the hat from the soapy water and squeeze it gently to remove most of the water. Don’t twist or wring it! (That will make your hat stretch out of shape)
You may see some dye in the water.
To rinse, submerge the hat in clean hand-hot water and gently agitate. Repeat.
The water should now be clear. If it’s not, then you’ll need to rinse again.
Gently squeeze the rinsing water out of the hat and place it flat on a clean towel.
Roll the hat up inside the towel into a firm sausage shape. This will absorb most of the water out of the hat.
Lay the hat nice and flat to dry, either on a drying rack (a cake cooling rack would be fine) or on a clean flat surface.
Try not to stretch or shape your hat before it’s dry.