bought a new ipv4s + tfv4 tank need help with few questions

[crxess]

1. No firmware upgrades yet for ipv4s, its pretty much the ipv4 with the upgraded firmware 120w/ 100j in ti mode and 50j in ni200 mode, no more glass mirror finish, battery charge port all covered up

2. Before u pull, do a ... Reverse pull, if that made sense, press fire button, but instead of sucking air, u are blowing/forcing air back into the tank, the result would be all four airflows will vent out vapor, do that within 1 to 2 seconds and then take ur pull right after, u SHOULD have no spit back

Never had to do that with any tank I ever built. Get the
Power
Wicking
Air
correct and they don't spit back.

 

[Stinkytofus]

Never had to do that with any tank I ever built. Get the
Power
Wicking
Air
correct and they don't spit back.

happened with subtank, subtank mini
my freemax and tfv4 didn't have this problem

 

[jemton]

Never had to do that with any tank I ever built. Get the
Power
Wicking
Air
correct and they don't spit back.

happened with subtank, subtank mini
my freemax and tfv4 didn't have this problem

what u mean power wicking air? any videos or pictures i can follow please?