2018 Unity MB
Fixed mine with clear, non-foaming Gorilla glue. I live in the desert and the magnets haven't come loose since I glued them down a year ago. They work really well but you do have to be careful folding them when they have been in the open position for an extended period to be sure they are folding correctly into the frame. As for keeping the front one closed, mine were installed by LTV and included a little U shaped clamp that attached across where the blinds split with velcro. The clip keeps them closed nicely.We love our Remis. They are a bit finicky, especially the plastic strip magnets that peel off under excessive heat. I plan to replace them with a few little neodymium magnets epoxied in place. That should fix the issue for good.
I also have a reflective sun shade I use when it's really hot or cold. It fits between the glass and the Remis.