Re: Having a hard time getting my insoles sweat stained..
put your new keds on with some worn socks. put some hot water on your socks & keds. Don't put excessive water (not more than 50ml for a pair). Wear them for 6 hours. You would not only find stains inside but would also find some sweat stains on the top of your keds.
might wanna try peeing in em😉