This sounds very strange indeed. I've been trying to get Kentmere Bromide to go a little warm and have never been able to do it. I've used amidol, Neutol WA, PPPD and lately PF 130. I've even added extra KBr to the 130. I've toned in KRST at 1:20. 1:50, and 1:100. Used three different fixers too, all of them rapid fixers. Lately its been TF4. All of the chemicals are mixed with the local tap water.