It's dirty? A quartz can't grind through any dust, did you have all of the
gaskets replaced and tested for waterproofing with the battery change? See
http://www.tmpco.com/tag.html We once did a high end Swiss quartz very thin
ETA movement, the customer complained it lost time at night. We did it 3
times, same thing. She was putting in a safe on an outside wall during
winter, just cold enough to get the circuit not to work right, we put it in
the fridge same thing.