I swallow a teaspoon of DMSO every now and then to remove "free radicals" from the body as well as the numerous other beneficial things DMSO does for the human body.
I have a video of myself doing so. You may view them here:
Also, here is the link for the combination of DMSO + Miracle-Mineral-Supplement .
You do not necessarily have to combine the two for your knee. DMSO itself is extremely powerful, but here is the link detailing the combination: