Harsh
Well-Known Member
If one can get decanted quantities of Meguiar's D120 glass cleaner from any neighbouring detailer (minimum containers from Meguiar's are a gallon), I've found it to be quite effective in cleaning windows and windscreens without leaving smears or wipe marks. Have used and found products from Armor All, 3M (consumer range from Meguiar's) and Sonax to be inferior to the D120. The trick is to use very little product and a non-linting glass cloth.
A couple of minutes of claying the glass once in 3-6 months removes other embedded contaminants.
A couple of minutes of claying the glass once in 3-6 months removes other embedded contaminants.