when my finger change from one string to another string, there are sound of the string before. For example, I play a high F on E string, then follow by other strings. when I switch my finger I can hear a pizzicato sound of E string.

The question is a little questionable. I'm not exactly sure what you asking, but I can tell you that planting your hand (while pizzing) on the fingerboard can help these surface sounds. Some surface sounds take years before they can be eliminated, so I wouldn't worry too much about it if I were you! Hope this helped, Best of Music!

I know what you mean it happens to me now and again (when playing greensleaves mostly). It sounds like your finger has stuck to the string so as you lift it off the string it makes a sound as if you have plucked it.

yes. My finger ve stuck on the string. how to avoid it?