I recommend that all handmade peices are handwashed and laid flat to dry - here are some general tips: how to wash handmade items
Acrylic yarn can tolerate gentle standard detergent.
Press water out with a towel - reshape and then leave flat to dry.
WOOL items are best cared for with wool specific wash such as Eucalan (link takes you to my favorite local knitting shop Starlight Knitting Society - not an affiliate link just a non Amazon shop that offers free shipping!)