Tip para di nahuhulog ang suction cup. Apply a very thin coat of silicon grease on the outer edge of the cup. This seals the vacuum inside and does not evaporate when the windshield is under a hot sun. If you just wet the cup with water the water evaporates and the expanding vapor inside negates the vacuum and actually pushes the cup off. Silicon grease will not evaporate and makes a lot better seal.


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