I use my own (made it myself) soap on my hands figuring the worst it could do would be to influence pH - not likely in the small amounts the soap would be anyway (as a residue after rinsing). No additives in that soap.
I also use plastic grabber tools if I just need to prod something around a bit or pick up a frag, etc. rather than sticking my hand in there.
And I don't use lotion anymore (just in case I forget)