This time of year I let the new tire sit in by the wood stove to warm up whilst I remove the old one, but I've never had any trouble getting the old one off. I wouldn't use silicone for a lube, too hard to wash off and it won't really dry out. I have a gallon jug of some tire change lube I bought at Napa. I do use it for both removing and installing tires. I don't have the HF machine (though I kind of want one), I just use 3 tire irons and an Aerostich bead breaker.