I have a general question. I been buy gently used beads and jewelry and taking the jewelry apart and reusing them in something new. my question is I have those pretty beads that are on strings and I want to take them off the string and make something new with them how in the heck can I get them off the strings without damaging the beads. I have been soaking them in hot soapy water it worked on some but not all. any suggestions?