Stop in for a cup of coffee

Gonna go charge up the AC on Cinnamon in a bit. Looking at the procedure in the FSM, they put the cans in warm water. Any need to do this? Is that just to speed it up, or do you not get everything out of the cans otherwise?
Not necessary. Just charge through the liquid line (low side) Edit: good thing this post is a few pages back. I see there is a disagree. LOL I have been charging A/C for decades and have always charged through the low side. it is fast and you don't have to rely on freon temperature.