Yeah, only took me 66 years...
Better late than never I suppose. My blind spot was thinking that I'd been doing this since I was a kid so there was nothing to improve upon.
Going back to the original reason for starting this thread. Getting the bead off the shoulder of the rim. I think that lots of soap & water, and pushing the tire away from the rim while working around and around until the bead lets go will do it next time. I don't think the sealant had much to do with the tire being stuck on the shoulder but I do think the hard plastic Bontrager rim strip contributed to the problem. Just a guess based on very little experience...