Dry Guy four prong shoe dryer. Used 6/wk for around 18 years. The knob broke off but they were smart enough to have a keyed shaft such that a butter knife works
Nifty Design for a Space-Saving, Wall-Mounted, Heated Drying Rack for Boots and Gloves - Core77
DryGuy Dry Rack - Walmart.com
Review: DryGuy Force Dry Boot and Glove Dryer - 14erskiers.com
DryGuy Force Dry DX - Boot and Glove Dryer | FREE SHIPPING in Canada