When using any type of internal window cleaning kits its better to use microfiber cloths with just water instead of using microfiber glass mop pads and any additives. Its said that if a surface is deemed to be clean there should be no SSR's (Streaks,Smears,Residues,) left behind, most additives will leave some residue behind on the glass and with the heat generated from insides these residues will dry out on the glass which will make them appear smeary when the sun shines. from my experience i have found using microfiber cloths with just water to be more effective especially on internals if you want to achieve a finish free of SSR's. Tadgh