Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
Is it the adhesive letting go or they are poping?
This is interesting. All the screens I have had come unglued were just bad gluing from the manufacture. Everyone had me convinced it was my chemicals. I don't use a dip tank so I would check on that. Are you losing them all at the same time. Just after they dry from reclaim before coating. That's when I lose all of mine. I have never lost on on press or when coated. I think the glue can handle anything but it seams the longer they are wet the more likely they will pop. Have you changed anything in the reclaim process. Maybe leaving them in the tank longer then before? Is a new guy cleaning them?
Well from all the info I have to say it was just their time. Since they were off all different ages and you didn't change anything there is not much you can do. Just keep working. I have had weeks of screens letting go followed by months with out one. If you keep getting then for the next week or two revisit it.