As with all chemicals they must be allowed a certain amount of time to work (dwell) so leave area to soak for a few minutes and then start on the next glass surface, agitate the first area with the towel, dry the glass with the second towel by agitating in the opposite direction than that used in the cleaning, and repeat for second glass surface and etc. For each section of glass use a clean side of the folded towel

Use dedicated Lint-Free Surgical Towels; they have a tight cotton herringbone weave that is ideal for hard surfaces like glass Towels by Dr Joe. Fold the towel in half and then half again Mist the glass surface with 1:1 ratio of distilled white vinegar and water solution in a spray bottle or Stoners Invisible Glass? Trigger Spray Bottle ?
USA ? PAC
UK ? Performance Motor Care

Alternative Product:
a)Cobra Waffle Weave Glass Towel
b)Ultra-51 Glass Towel- It has no nap, making it very similar to a huck towel but with the added benefit of micro fibre technology ? Towels by Dr Joe