buy an extra chain, swap them on saturday, dunk/soak *them clean in solvent ,
and be ready to do it again next saturday..
*or wax pot.

Probably go through a cassette and a pair of chains at least every 6 months , I'd guess..
Given that's 5200 miles ..

YMMV...

Maybe one of those plastic tank chain-cleaners, every few days..

wipe off the outside, oil there does not matter, under the rollers is what wears..







.....