I have a product that uses compressed air. It has a nozzle akin to a plunger. You put it on the pulg hole and press. It shoots compressed air into the hole and clears it.

I purchased it from QVC UK and they will deliver it here. I can order it for you if needed.

I couldn't find that item but there is this:

http://www.qvcuk.com/ukqic/qvcapp.as....yah.UKGD~U085