Ive tried boiling strings in the past. Results were ok but not nearly worth the effort in my opinion. I tried denatured alcohol. It works for sure. Fast forward to 2 days ago, playing an acoustic gig. I was playing a jazz bass string with TI’s. We were playing at a rowdy redneck biker bar. I was DD that night so I was kindly turning down shots. Some chick came up with a tray full of rumplemintz. I said thanks but I’m driving. Gotta pass. She then threw the entire tray at me. Had peppermint alcohol all over me, my bass, my eyes were burning out of my head, it wasn’t pretty. The next day, grabbed my bass and started cleaning all the sticky alcohol off. Plugged it in, and the strings were DEAD. And I don’t mean that good flatwound dead. I mean sounded like garbage dead. I pulled them off, put them in a plastic container in the sink, squirted dawn in there, and used the sprayer on the sink to make hot water soapy bubbles. Let them sit for a few minutes, rinsed with cold water, dried them off, and restrung. To my surprise, not only did they come back to life, but they sounded new! I have 5 other basses strung with TI’s, one being a 6 year old set. They lost a lot of top end so I decided to do the same with them. What do you know, all the life came back. I’m guessing since dawn is a degreaser, it breaks down the oils your fingers leave behind and deaden strings. Just wanted to share my experiences. Not sure how it would work for rounds, but if someone wants to try and comment, please do. It most definitely brings thuddy flats back to life.