Kayang-kaya i-DIY yan.

Been using Glass Science Glass Scrub for a year. Mga twice a month application kung tagulan, smooth na smooth laro ng wipers. Last application ko nito (since tag-araw naman ngayon), nung January pa. Also, nag 1 year old na yung wiper blades ko nung Jan. 30, 2009 as well and wala pang problem.

For clarification, this is NOT a coating you apply on the windshield like Rain-X. It's basically a very very fine "rubbing compound" for the windshield. It's for removing watermarks and road dirt that would otherwise affect wiper performance and longevity.