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VINEGAR must works.7 m! R8 \, t2 \2 f6 l, {6 }
& I# U% O" B7 cBut you need some more conditions:
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1 U7 `; M2 C: a4 }* D% n1. the solution of the vinegar must be at least 5-6%, so it's better you buy a vinegar acid to add appropriate water.% a3 E* n( |8 o& a! p8 ^1 q$ |- C
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2. 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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