Just cleaned all my windows from the inside. I also cleaned the kitchen tables and the glass oven. I only had streaks when the pads got dirty. I replaced the pads with clean ones and continued cleaning. I didn't even have streaks on my very dirty kitchen window. You must tie the window cleaner with the attached tether. I bought https://smile.amazon.com/gp/product/B07SBZ97SL/ref=ox_sc_act_title_1?smid=ADN9631RYBGI6&psc=1 because I couldn't figure out where else to attach the security cable.