The ice dams are from heated air leaks to the attic from living spaces below. Many times ineffective wall insulation will have convective loops that deposit the heat to the top plates which have minimal insulation between them and the roof structure. Wire holes, etc. let air from below into the attic combined with lacking ventilation of the attic = ice dams; http://www.buildingscience.com/docum...d-135-ice-dams
Did you completely air seal the attic before adding the insulation? http://www.google.com/url?sa=t&sourc...O842EQ&cad=rja
You need a balanced attic venting system, just adding more may not solve your problem. On the other hand, how much attic venting do you have? Number, size of intake (soffit) vents, number, type of exhaust vents, powered, static, etc.
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!