With all this cold weather we have been having when I have been able to be open and wash cars I have noticed that my presoak is not as hot as it needs to be. I have a hydrominder system that has a small holding tank for the presoak and it has a heating element in it and the water supply to the hydrominder is fed thru an on demand aquastar heater. When I am busy the holding tank for the presoak really does not have time to heat up the presoak and the water being so called is barely warm as it comes thru the aquastar...could be I need a new aquastar but it occurred to me that I maybe could place my presoak supply drum on some sort of heating pad to give it a bit of a head start. Is anyone else doing anything like that? If so does it really help? Just wondering....