I use 1 of 2 products. Chlorhexidine or F10SC. Both are Veterinary grade disinfectants that are safe to use around animals when diluted properly.
Cleaners: http://www.reptilebasics.com/cleaning-products
Just dilute with water to the recommended ratio, spay dow the cage, let it sit for 20-30 minutes (this is important, don't skip), then wipe up. A thin layer will be left behind that will continue to work for a few days. Chlorhexidine is so safe some vets use it as mouthwash (very diluted of course)
You will set the thermostat to whatever achieves a 90 degree hot side in the cage. For example one of my thermostats is set to 96 to create a 90 degree hot side. This is where your probed thermometer comes in. Start by setting it to 90, then after you let things warm up check your thermometer and adjust the thermostat as needed.