How would

Vinegar and a nylon scrubber pad should do it unless the spots are due to heavy buildup. Once you get the spots off, cleaning the glass more often will make it easier. You can avoid the spots in the first place by misting with demineralized water or Reverse Osmosis filtered water.
 
I wouldn't say it is heavy build up but the tap water at my house is outside city limits so it does not go through as much of a powerful purifing system so has a lot of minerals like calcium and what not.
 
Use lemon, it doesnt smell as much as vinegar... should work a treat if your build up isnt too bad :)
 
Back
Top Bottom