I had 2 new sinks installed for a bath remodel. Both had small leaks from the beginning - 1 at the drain connection before the p-trap, the other at the drain connection after the p-trap but before going into the wall. It's been a few weeks since the install and now the leaks don't occur anymore no matter how much water I run. The contractor has to come back to finish up some other work. Should I have him take a look at where the leaks were and attempt to reinforce the seals where the leaks were or should I consider them to be "fixed" and not mention it to the contractor?