I don't know.
Join Date: May 2003
Location: South Meriden, CT
Posts: 2,094
Bikes: '90 B'stone RB-1, '92 B'stone RB-2, '89 SuperGo Access Comp, '03 Access 69er, '23 Trek 520, '14 Ritchey Road Logic, '09 Kestrel Evoke, '08 Windsor Tourist, '17 Surly Wednesday, '89 Centurion Accordo, '15 CruX, '17 Ridley X-Night, '89 Marinoni
I wash mine after every ride, but have only started doing that in the past five years. The prior 35 years I only washed them occasionally. I also rinse my helmet after every sweaty ride now. Never used to do that.
I wash my kit in the washing machine with cold water, extra gentle cycle, and very little detergent. I stopped hand washing kit 15 years ago probably.