Maybe mold got resistant to clorox. I know when I clean (doing move-outs) there is no remedy for black mold. the only way to clean is by cutting the caulking, allow it to dry completely. My manager says no clorox, no water... brings the hot dryers - and he wipes with those wipes and new caulking is put in place, or the mold continue to grow underneath. so, it makes sense, when washing the mold of cuttings, actually the water feeds it more. perhaps drying it off completely is the key, here the wipes did the drying - Good for you Pete!
I received a cutting that had mold in it. I did not wash it, I wiped and let it dry completely- I wiped a couple more times, and do not allow that mold to grow....these cuttings are like babies.. must monitor them, feed, clean and make sure they sleep through the night...