Hi Guys, we receive excellent feedback from window cleaners who use our little waffle microfiber glass cloths, available in 40x40x370gsm @ €3.66 each and 38x45x370gsm @ €3.96 each for a streak free, smear free, and lint free finish. we also have new stock of HPD (high performance detailing) microfiber cloths available in 19"x19"x190gsm these are the highest quality microfiber detailing cloths available anywhere on the market today, excellent for detailing interior glass,mirrors,crystal,etc surfaces. guaranteed no other cloth will come close for optimal results to these cloths for detailing interior glass surfaces @ €7 each.