
Originally Posted by
yebo
RainX or Rain Act lang yan, and the usual cleaning.
1. clean the outside of your windshield very well. dapat walang wax residues, no salt, no grime. the best to use is Joy liquid detergent, matapang ang halo, and you might have to do it several times if the car is old. after washing with joy, use glass cleaner. be careful not to spray on metal parts as glass cleaner has ammonia. better to wet a clean cloth/pranela and wipe the glass. then wash with fresh water. wipe dry, do not let the water dry by itself as water from the tap has dissolved salt.
if the car is new and never been waxed then simple cleaning with plain car shampoo (no wax!) should be enough.
NOTE: do not even try to apply RainX or Rain Act on a windshield that has not been cleaned as above or else the windshield wiper will shudder during operation. that's because the deposits on the glass will cause the rubber to skip.
2. apply RainX or RainAct "invisible wiper" silicone coating as per the procedure described on the bottle. best to use cotton balls and not cloth/pranela when applying.
3. on the final buff it is best to use a slightly damp cloth.
4. for the inside, clean with joy detergent and then rinse using a damp cloth several times.
5. apply RainX or Rain Act Anti-Fog. this is different from the invisible wiper, this is for use on the inside of the glass to prevent fogging of the glass.
i have been doing this for years and i never had any problems. there will be some people who will say that RainX and the like will cause the wiper blades to shudder or skip. the secret is a clean glass surface, and "clean" here means very clean. any wax residue, salt deposits or dirt/grime, no matter how invisible will cause the wiper blades to skip. if the glass is clean before applying RainX then you will have no problems at all.