Scrub It! Glass Scrubber is safe on all glass including defroster lines. shaped to reach into tight corners. Backed by a stiff pad for harder even pressure. Pads can be replaced when worn out.
Scrub It! Scrubber Pad for Glass
Much better than a sponge or thin scrubbing pad. Cleans glass much faster. Worth the money.
Haven't used it yet but I surely love it