Fixing My Rowing Machine

Somewhat on a whin last year, I decided to buy a water based rowing machine to use in my workout routine. Rowing seemed like a fun change, and it's also apparently "one of the best cardio workouts" according to some sources as it's full-body but low impact. The specific rower that I bought is a Cardiff R370 , bought second-hand for a good price. Unfortunately, sometime in the last months the…