Make sure it was in good condition before tenant moving in

If you are sure that it was in good condition before the tenant moving in, you should send your tenant the bill. Just see his/her reaction.

I assume that $105 blind means your preperty is not low end.  The rent should be high (>$1500?).  So you need to budget for repair cost.  If your tenant is a good tenant in the past, you should let it go. 

Otherwise, this tenant is a headache.  You need to visit the property to make sure this is the only issue.

Good luck!