Everyone will have different opinions but the safest idea is to hand wash with cold water, if are really worried about smell you can use a vinegar mix, but we haven’t used detergent and haven’t used a washing machine (Ultra Pro laces plus washing machine is a mess I would not want to be involved with). Then let it air dry, usually outside to let it “freshen up”. Overall though I would try to clean them as infrequently as possible and maybe just do the briefs and the shirt since the canvas will be an ordeal with how that suit it set up.