Removing Oil Stains
There are a few effective ways to remove oil stains. One way is to sprinkle cat litter over the stain, and then rub the surface with a soft brick. Another option is to sprinkle dry sand over the stain to absorb as much oil as possible, then brush it off and wash with detergent.
Removing Registration Stickers
Removing old rego stickers can be a pain. So rather than using a razor blade, rub the sticker with cottonwool soaked in nail polish remover. The sticker will dissolve, and you can then clean the glass with methylated spirits.
Clean Your Windows
To keep your car windows clean on foggy mornings, cut a raw potato and rub it over your windows. When it dries it will keep the windows clear.