I have been having the exact same problem, I bought a rebuild kit. Rebuild seemed to go okay, but I'm on my third button. Two have already melted

I've washed the mod, filed the firing pin, and applied noalox. I am using EH IMR 18650, 2250 mAh, flat top
batteries. I thought read somewhere that button top are better, is this true? I was having NO problem with my older
batteries (same kind). Just bought new batts cause I thought it was time for some fresh ones. I rebuilt my mod because I squashed my inner gaskets -- was tightening Reomizer down to much. I run my Reomizer @ 0.6 - 0.9 ohms.
It is the only
device I have currently working (well kinda) and I don't want to send it in. Need to save some $moolah to rebuild my other Reo mod so I have a backup.