I have struggled to disconnect the bullet connectors when stripping down and have ended up pulling the connectors off the wires before now.
Well, here's an easy way to get them apart. Simply warm the connectors up, gently with a hairdryer, this softens the hardened insulation, breaks any seal and they seem to pop apart easier than when they were new. Give it a try, works every time. Used it today to unhook the headlight connectors, wouldn't budge before I warmed them up.
Brian.