I usually wouldn’t wash them unless they have some sort of wet grot like cat sick on them. Just hang them on the line and beat the shit out of them with a broom or suchlike. If wet wash is needed make sure it’s cold and gentle. Stomping on them in a bathtub is a better idea than a machine. Hot water and too much agitation will get you lumpy felt.
I usually wouldn’t wash them unless they have some sort of wet grot like cat sick on them. Just hang them on the line and beat the shit out of them with a broom or suchlike. If wet wash is needed make sure it’s cold and gentle. Stomping on them in a bathtub is a better idea than a machine. Hot water and too much agitation will get you lumpy felt.