Ok- not to be a total yutz, but what do I spray it with? When I clean my bathroom, I have the luxury of being up close and personal with the gunk and can monitor the progress and go back at it. Usually I just hit it with TSP or slap on some bleach but again, I'm right there and can go back again and again. Plus, if the bleach is too strong and eats the caulk, I can easily remedy that! Any suggestions for a particular "recipe"? (Is it obvious that I'm not usually drafted to be "cook" for family events??) ;-) Thanks!