ΟΚ... let's tuck all the information in a post:
About assembling
1. While we assemble the GG4S, first screw the button center post to the button before put button to the brass body.
2. First screw the battery (not very hard, only until you feel a nice resistance) and then screw the lock against cap. That way GG4S will stay solid and battery will not compressed at all.
3. An extra "Side Button Pin" could improve the conductivity but it's not necessary because the volt drop is already 0,1volt with a 0,6 resistance.
Conductivity issue
1. Your button center pin became short because of the huge cleaning. You can put a thinner o-ring inside the brass body or uncsrew 1 turn the button center pin. If thats not enough then do the 2 too.
2. Unscrew 1/2 of a turn the side pin
3. Watch out your battery. Has to be flat on its negative pole. NOT to be concave.
Hot button
1. DONT squeeze the battery a lot.
2. Clean the center pin, the inside surface of the button and the outside of the brass body where button touches it, with mesh.
Stuck button
Unscrew 1/2 of a turn the side pin
Use the lock option
1. Lock GG4S by keeping the button and screw the lock
2. Unlock GG4S by keeping either the button or the atomizer cap and unscrew the lock
Tricks
1. If you want to hear a nice "click" when you push the button, put the spring upside down
2. If you like a shorter button path, put a 16x1,6 o-ring instead of the 17x1,5 that GG4S carries