|
|
VINEGAR must works.8 M3 N: B8 Y. Z B) q
8 E% o Z* R+ IBut you need some more conditions:
: W1 D8 m5 {8 X5 {5 ?( S- H
3 r: n. S6 f2 {, r Z+ G1 f1. the solution of the vinegar must be at least 5-6%, so it's better you buy a vinegar acid to add appropriate water.
+ E7 o: f2 d8 J7 `/ o+ S: j, f* v3 X4 y* q. j$ K7 b5 F& u- p
2. the temperature of the vinegar should be around 40-50 degree C.
" U# P3 Q8 f' V0 k' z3 u* a0 X3 P$ [2 y
3. At least 1hr per day for around 1 or 2 monthes, you will be OK. U# j! a' O8 u* K& f$ }/ u- G
( m$ f9 H, |6 Z A* kgood luck. |
|