my bottle completely full is at most 800 psi and i have a bottle warmer, wtf is wrong

 

is your warmer working properly? How long do you let it heat up. could be the gauge

 

Either your bottle isn't full or your not heating it enough. A full bottle at 50 degrees or so is only going to read around 800PSI, and it will take you a good 20-30 min for your heater to get it up to 900 usually. They heat slower than you'd think.