Only bring the irons up to 90 deg (vertical). More than that is when you pinch the tube between the iron and the rim.
Don't get greedy, only move the iron over 5" or so for the next bite.
Use lube, Armor All is good, Soap, no oil or grease.
If it is hard to pry on, look at the oposite side and push it into the drop center.
Air up the tube several times to get the wrinkles out.
"Dad, can I get a motorcycle when I grow up?"
"Son, you can't do both"