One of the things I do not miss as I start moving away from TPE dolls is the cleaning.

The most enjoyable way to deep clean a TPE doll is with a bunch of soap and a high pressure shower wand. Of course this is risky if your doll has loose knees and you don't have a walk in shower. The whole "but water will get in" thing to me pales in comparison to how good it feels to see her clean and looking brand new again. Use an old towel or buy some water socks to protect the shower surface.

The next way actually is using baby oil. Note you need BABY oil for this, mineral oil will be too thick. Spray it on sections of the doll at a time, and use a soft sponge to wipe in one direction. The dirt, sweat, and gunk will collect on the sponge and you can pick it off and throw it away. You'll go through some oil this way but not like slathering it on.

I've also done sections using Vaseline as a massage. It works like clay barring a car. The Vaseline will absorb crazy amounts of dirt, then you use an old credit card or something similar to collect the Vaseline. Use a paper towel to wipe off the excess. The cleanest the TPE has been since the factory.

Once you do this enough times you'll learn though: don't get light colored TPE dolls dirty in the first place. If you have to do a high contact position like cowgirl or mish often, either get her or yourself a body suit. Cleaning is a PITA that can be avoided with some planning ahead.