For your UNDIVIDED FLOW Cap
As the crown of the cap is constructed from material that is made to maintain the rigid shape of the cap, it is best to avoid crushing it as this will result in permanent damage.
Occasionally on lighter coloured caps, sweat marks may appear. To remove, run cap under a tepid tap, completely soaking cap and then allow to drip dry without crushing.
Lighter caps may pick up marks from time to time, to remove use a damp lint free cloth or sponge to agitate mark and then run under tap. For more stubborn stains put a tiny amount of soap in a large amount of water and then repeat as before.
After prolonged period of use the caps may begin to smell, if this happens, place cap into a paper or plastic bag and place into freezer for a couple of days to kill bacterias that causes odour.
Use bleach on your Cap
Place inside Washing Machine
Crush the crown