I first heard about this in a random youtube video comments and then discovered there are quite a number of gardeners that fridge dry. They even bud wash before hand as well, with no mold issues. The guy that schooled me up said the RH will be sky high initially and it eventually stabilizes as the plant dries.
He said that with fridge temps that low, it reduces mold risk and the low temps within the fridge along with rh around that level actually convert to the traditional 60/60 range we aim for in a typical dry room set up.
This is my first time attempting this, minus the bud washing and so far so good. It’s too hot at the moment and cant afford cooling costs to hit 60/60 so I opted to try this method.