If one knows anything about science is of course clear that the drying works only with reasonably normal room temperatures around 20 degrees and more. If it gets colder, it works just not as good, but you can read in the physics book or Wikipedia.
I would like to commend at this point also the after-sales support from the manufacturer. Although I did not have him take, I got one to two weeks after purchase without being asked about an email from Amazon Comedes in which were offered for problems of any kind with the product free support via a toll-free number also me. Today this is in my opinion not self-evident and therefore worth mentioning.