Haven’t read through sorry if I repeat.... a friend who worked for a major chemical company (think Dow/3M level) use to be one of the people that MADE the adhesives. She said they had to continually find new ones because people kept developing an allergic reaction (after awhile) to each one they came up with. My wife and I are firm believers that ‘the old stuff was/is best....find it if you can. Lol.