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Hi Folks. I have a favorite hat made by Panama Jack I wear a good deal in the summer however I have noticed it has become more than a little grubby. I contacted the manufacturers & I have to say I was surprised that they were not very much help, I guess in the litigious world we seem to live in they are worried that if i damage my property because I followed their suggestions I may demand a replacement or sue them for damages. Anyway does anyone have any suggestions? The hat is stiffened canvas so obviously I don't want to do anything that would cause it to soften & loose its shape unless I can re-stiffen or starch it to regain the shape. I promise I won't sue if your suggestion causes any damage :-)