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VINEGAR must works.& J. e; [3 Z9 o% l4 z9 I k
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But you need some more conditions:/ v% M5 p: q8 k+ t# i# @
6 m3 G1 z& q8 X2 l9 w1. the solution of the vinegar must be at least 5-6%, so it's better you buy a vinegar acid to add appropriate water.
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. t; z3 d- b8 y9 Q2. the temperature of the vinegar should be around 40-50 degree C.
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" W& o$ E, d, y/ a- s0 U& e. \2 a3. At least 1hr per day for around 1 or 2 monthes, you will be OK.
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/ _' O6 G% }# S1 k; U( L2 [good luck. |
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