QUOTE(limhongwoon @ Apr 25 2013, 12:04 PM)
Hi. I would like to ask which type or brand clay should I buy to clay the Windshield
Is there any fake Rain-X in the market ? Because I notice Shell Engine Oil selling in Tesco also fake , so I am worry about Rain-X . Will Rain-X Make Windshield crack or other problem ?
Last Question is how to prevent power window squeezing sound when rolling up and down ?
im using cheapo soft99, id reckon any detailing clay from any reputable brand should work
no idea from fake rain x, there's a lot of imitation products though. just remember that if it is too cheap to be true, it probably is.
can verify on rain x distributor sticker, and buy from reputable sources (eg: super markets or ace hardware

)
AFAIK tesco don't sell fake engine oil, however their engine oil are imported, not local distribution market (save cost)
alcohol is unable to make windshield crack. if you do have any cracks, it'll be stone chip or other impact on a spot, even if it is just a small dot, it may eventually develop into a long crack line as time goes by (with heat, wind pressure and what not)
for power window, you may need to check your power window motor, if there are any torn seals for on the door panels itself that touches the glass, or if you're using too thick of a tint on the glass itself.