A gal asked if she could use isopropyl alcohol instead of soap and water to clean her pieces because the water was getting under the tape; No, alcohol isn’t good enough alone, in most cases, and in my opinion.. If you leave flux on the solder, it will eat at it, and make it dull. Isopropyl alcohol will dissolve light surface grease, but I don’t think it’s enough to get into all the nooks and crannies of a heavily textured piece, or if you use paste flux. If the surface is flat, with no texture, good wiping with an alcohol wipe may be enough. If your cleaning is getting under the tape, you haven’t burnished it well. Spend more time doing that. And when you’ve done the time you think you should do, do it again. Get a roller, makes a huge difference. Flux is really greasy, you need soap with grease-cutting surfactants to remove it. Baking soda and Dawn liquid detergent mixed to a toothpaste consistency is about the best. Scrub it, use a brass bristle brush - buy them in sets of three at the hardwares used for cleaning battery posts. I use a roller thing on the flat surface. The groove on the handle of this tool can be used to really smush the edges if the tape first. My tool is a bit different, but it wirks the same. https://www.amazon.ca/Foiler-Smooth-Roller-Delphi-Glass/dp/B00HHCSTIO/ref=asc_df_B00HHCSTIO?mcid=f96ed901b18935fda4a2ce746c0718c9&tag=googleshopc0c-20&linkCode=df0&hvadid=706828873355&hvpos=&hvnetw=g&hvrand=10861453742117562323&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9001455&hvtargid=pla-1159152772441&psc=1&hvocijid=10861453742117562323-B00HHCSTIO-&hvexpln=0&gad_source=1