Just two quick questions. Is it ok to leave precision tips on the e liquid bottle or should I take it off and put the cap back on. Also weird thing about my ego C. No problems screwing and unscrewing the battery from atty compartment on each one of my starter kit. But when interchanging from one to the other there was a decent amount of resistance. Felt like the threads were not finished properly. Managed to screw it all the way together and work it out til there was little resistance. Anyone else have that problem with ecig threads?