I am such a head sweater, that, even with cleaning, I have to have 2 helmets. If I don't rotate, it's ugly. The one i wear more always gets crapped up on the straps and the inside pieces. We do keep a supply of the replaceable pads, because with my sweat, they always start getting loose and disintegrate. I've only replaced one helmet for a crash, the rest all for just age/sweat/smell.