Been using Scott Shop Rags from Sam's Club for years. $14.00 for 350 industrial paper rags that are just as good as any rag I've used. They don't scratch the paint on the bike and they hold up really well when wet. I keep several of them in the van in case I need to work on the bike when away from home but have access to the van.
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HCFR Cycling Team
Ride Safe ... Ride Hard ... Ride Daily
2017 Colnago C-RS
2012 Colnago Ace
2010 Giant Cypress