hermes, I reset when it reaches 36 spins (including first 2 spins).
But really, you could try your way. Or you could reset anytime it reaches a positive bankroll (I've tried a few times and it always manages to reach back positive bankroll at some point, though it might be sometime before it will just be -ve all the way)
Anyway no system is infalliable, there are good and bad ones though.
Btw, is it true RNGs repeats more often. If thats the case maybe this system could work on a real wheel. I don't know. I tried like 10 sessions was already easily up by 5000+ units.
By when I tried on RNGs made a loss, but the repetition was ridiculous, I had 16 numbers unhit after 36 spins and stuff like 1,22,33,33,22,20,14,1,33 or something like that happened in my run.
Anyway maybe u try it for a few sessions and tell me what you think.