I had that experience before. It can be fully removed, if you spend a lot time rubbing with a sponge and finger nails. With some good cleaner, of course.
三个选择,之一一定能解决. c" ~- f: Z+ n. J5 N6 M1 i1 m
1。洗甲水(丙酮,acetone)( K7 C5 I5 T. Z. Q* p% n2 @
2。白醋# T7 d) u4 w1 @7 ^( ~
3。xylene% t% r: w( O. I' e E
) Q' a, u: e/ b" p0 l