You mean window glass not grass. The best way is

來源: TZH-WXC 於 2010-06-16 07:36:40 [] [舊帖] [給我悄悄話] 閱讀數 : (184 bytes)

not using it, try to tint the windows.

The problem are the suction cups. They are made from very cheap plastic and won't stay on the glass when temperature is getting too high.

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