Lycra shorts are 80-90% polyester. They go in the wash with my running clothes. I have a separate basket for them as I sometimes go even through 2 sets a day.

They are "delicate" fabrics, treat them as such. Cold/Cold only wash. I use less detergent that with cotton loads.

Dry low or no heat. It's best to hang/air dry, but I'm lazy and impatient. Do NOT use fabric softener/dryer sheets, I've never had them get static, they're software by design of the materials, and the stuff in fabric softener acts like a wax and clogs up the pores of the clothing and impedes the sweat wicking performance.