So recently i haven't been able to single tap as i just stiffen too much and get tired way to fast. it didn't used to happened before and if i don't stiffen up i cant spam single taps. Alternating is fine though. Single tapping with my middle finger feels fine too, just my index finger that is really screwing up. Could this be RSI, Mental Block or just habit cause i tend to single tap spam on DT which stiffens my left hand and in turn led to my index finger dying out of stamina? Also i don't stiffen up at all when alternating.