Okay, they are real. Will try baking them. And thank you.For cleaning the logs, if it's the artificial logs, just an old cleaning toothbrush and some mild soap and hot water. If they are real logs, like from the outside, I give them a bleach bath (1:10), then bake them at 250 for about 5-10 mins.
As for the heat rock, I, personally, would run away from that thing. It isn't worth the possible injury to your animal.