From Longman Dictionary of Contemporary Englishhandwashhand‧wash /ˈhændwɒʃ $ -wɒːʃ, -wɑːʃ/ verb [transitive] if you handwash a piece of clothing, you wash it by hand, not in a washing machine→ See Verb table
Examples from the Corpus
handwash• Anyway, which self-respecting rocker would handwash his originals? 