I've figured out a better way to heat up the peroxide so it is more effective and whitens faster. I bought a water heating element from ebay for $11. Last year I tried aquarium heaters and I burnt 2 of them up. They didn't work at all. The new element gets the tub of water steaming hot. I would leave it on for a while and then turn it off so it didn't get to hot. It was advertised as being capable of boiling water and I believe it. It would be nice to have a thermostat on it but for $11 I'm not complaining. When the water heats up it warms the peroxide bath. It starts to foam up. That's how you know its working good. I've also quit using the gel peroxide on the top of the skull that isn't submerged. I cut up a white shirt and covered the skull with that. I wrapped strips around the base of the antler below the burr. I would take a plastic spoon and wet the cloth with peroxide a couple times a day. It worked good and I didn't have to mess with the gel.