First off, you'll need an old cooking pot. I used a 2 Lb coffee tin.
You'll need something to keep the boots from burning to the bottom or melting. I used an old CB750 points cover. any old grill or grate will work, or even constant stirring will do the job too.
You'll also need a stove of some sort. I used my antique coleman stove for the job.
You'll need enough water to cover your boots.
You'll need a small amount of wintergreen Oil. I used 3 ounces in my 2 Lb coffee tin. Wintergreen Oil is an analgesic, its used for aching muscles and arthritis treatment. You should be able to pick it up in pharmacies or health food stores. I got mine at walmart for 5.00
Set the whole mess on the stove and bring to a slow boil for about 20 minutes. Let the mess cool until manageable.