Another simple method ......

来源: oldbrick 于 2010-03-05 15:23:06 [] [旧帖] [给我悄悄话] 阅读数 : (110 bytes)
本帖于 2013-02-18 18:32:49 时间, 由版主 江南茶花 编辑

you can use half diluted cold coffee, works quite well. It is a cheap and easy method. It has no side effects.

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