Use a styrofoam or insulated cooler to keep water warm when soaking your feet. I was using a small plastic dishpan, but found that the water cooled off too quickly. I took an old cooler, warmed it first with hot water, then refilled it with foot soak solution and water as warm as needed. The insulation kept the water warm/hot for a long time.
GenE2, what an excellent idea. I like to soak my feed but put if off because the water gets cold so fast. I'm going to do this with an old cooler I have. Thanks for this good advice.