Best way to Fold your Towels
The most important factor when hanging your towel on a heated towel rack is going to be the Surface Area of your towel that is touching the bars — you want to make sure the towel is touching as much of heated surface as possible! The best way to do this is to drape your towel over the bars to ‘sandwich’ them between each side, forming a pocket of hot air that will then be absorbed by the towel.
But what if you typically have two towels hanging up, as is the case in most primary bathrooms? Depending on your heated towel rack’s dimensions, you can use the same ‘tent-fold’ technique, but then fold the towel in half length or width-wise so that both towels can fit on the rack together. See following diagram for examples: