Trouble with 845

I own two huge car washes 14 self service bays and four automatics( total). I have two soft touch washes and a touch free and a combo wash. I have to use way stronger chemicals in my touch free to get mediocre results. The akline presoak will burn your skin to the bone. The soft touch is not that much of a swirl monster. The ere mark 7 soft washs
 
my understanding was that 845 was most effective in cold weather conditions (I could be wrong), but I just applied it after reading this (over WDGPS) and only let it sit for a few mins, less than 20 I think. will post an update by January to let you know how it did
 
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