i use just plain old water like les, with no problems ...
if you don't like the smell of stop, sprint makes a stop bath
and it smells like, mmmmmmmmm vanilia
pstt, they are a site sponsor too
8 oz. water • 4 slightly rounded tsp coffee • 2 tsp. washing soda • 1000 mg Vitamin C
DONATIONS FROM THINGS SOLD, SEE MY BLOG FOR DETAILS
( both are active links )