I avoid using product on my glass exterior and use a clay towel and iron remover and rinse off with DI water. That way I don't ever have to touch them with a microfibre. Insides I use Mr Muscle glass cleaner as I found that better than any 'car' product I tried. If you have to do the inside and outside go up and down outside and left and right inside, then you at least know which side of the glass is your smeary mess 
