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VINEGAR must works.0 B0 R# { O, s: a# t
+ B2 `! |% r! Q6 K& QBut you need some more conditions:
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. s# w# b2 U% \( p; m1. the solution of the vinegar must be at least 5-6%, so it's better you buy a vinegar acid to add appropriate water.8 M+ X9 @" B6 A2 W4 O
1 g% n; ?0 r4 l/ R5 C0 O# c2. the temperature of the vinegar should be around 40-50 degree C.
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3. At least 1hr per day for around 1 or 2 monthes, you will be OK.
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good luck. |
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