I wouldn't let him slide either.You are not running a rehab house.  

.- some won't agree but I install glass top ovens and a fridge with water/ice maker.

Unfortunately it did not turn out well.Long story short, I had to replace the wall to the tune of $10,500 (extra $1k charged by dump as the dirt had glass in it).

As a realtor and an investor, I look at pricing on a sliding scale.

@Dillon LopezThe below link let you see the glass as either half empty of half full. 

This is one of those vague threats of taking action against you if you attempt to enforce your rights.Any one of these I would let slide on its own, but taken together, this is a pattern of behavior that will not improve with age.First thing I would do is offer to release them from the lease because of the concern they recorded over the rain findings without penalty for early termination.

@Shawn Westbrook my personal must-haves: skirt board ladder, left-handed hammer, glass hammer, lightning hammer (never strikes the same place twice), wood enlarger, nailing lubricant, and a rip saw with a pull chord.

He found 6 windows with a crack in the glass.

That's probably why all the landlording books give warnings about letting people slide on their rent. 

Go to the search bar (magnifying glass) at the top of your screen and type in "inherited tenant" then read for the next 42 days.