In school, you certainly often told teachers clean the window glass with the use of newsprint (wet and dry). As a first step, spray water with vinegar mixture to the surface of the glass window or closet until half wet
Vinegar which serves to eliminate the fat on the glass can make dirt washed after using dilap remasa newsprint. After a somewhat dry, wipe the glass back window with newsprint dry so the glass of the window really looks kinclong