Discover the safest ways to clean wholesale fitted hats without ruining their shape in this quick CapBargain guide. Tossing caps in the washing machine often shrinks cotton twill and warps structured polyester. Spot-cleaning is the best method to preserve premium OTTO CAP blanks for custom embroidery. The guide also covers fabric-specific tricks, like using a vinegar mix for poly twills, while strictly warning against bleach and heated dryers.