Mouse problem in MF 1st floor unit

[Marc V Palmeri]

Hi,

I own the 1st floor unit in a 3 unit MF condo building in Dorchester.  There is a huge mouse problem that I just can't seem to conquer.  I've had an exterminator out 3 separate times but that only seems to diminish the population for a few weeks and then they come back.  Filling the gaps and holes doesn't help because they just chew new ones.  They laid poison pellets and traps everywhere but it doesn't seem to help much.  I've already had to have an electrician over twice because the mice chewed through different wires.  Does anyone have any advice?  I'm out of ideas at this point.  The exterminator I used was a BP referral and are very highly rated.  I don't see the point in sending over a different exterminator to just do the same work.  Any suggestions would be greatly appreciated!

thanks!

Marc