I think this is covered in the "Tweeks" section plus many many threads. However, I would start with a simple but good vacuming.
Unplug the speaker for a day or two ahead of time and do both sides (the front more than the back if you have the time). Don't forget to plug them back in, they don't play very loudly if not plugged in.
I think some of this information is in your owners manual.
Also if the construction is still going on get something to cover your speakers this will also help until the construction is over.
Kach22i is correct about vacuuming. You may do this a couple of times over a few days too since the dust will still be "floating" around the house.