You are welcome !
The main thing is. . the dash surface must be very clean with not previous "UV" dash treatment, cleaner, etc residues. The CRC MAF sensor cleaner is terrific for something like this and other jobs. Just get some clean paper towels, spray on the towel, wipe in a larger circle than needed and repeat two more times with a new paper towel. Alcohol, mineral spirits, and other solvents will leave residue you can't even see. If those are used, the adhesive will eventually let go. Also, good for washing down the actual MAF sensor once a year or so.
Oh . . . try an make sure the interior and dash is warmed up inside first and once you're ready to stick the mount on. .. do a "dry fit" a few times with the backing still on the adhesive pad to gauge where exactly you want it. Then remove the adhesive backer and kind of apply the mount with a slight rocking motion so the adhesive pad gets applied evenly.
Then Press. . press . . . press it down many times.
I would also wait at least 1 or 2 days before using it and press the mount down a few times during those days to assure a firm mount. Once that pad is stuck down. . it will be very hard to remove.
I use this same cleaner on electronic circuit boards and other delicate plastic surfaces as well for several years now. It is akin to a freon type cleaner which is key for leaving no residue behind.
EDIT: - - This is what I bought and where.
https://www.amazon.com/MAGDMB-Magic...show_all_btm?ie=UTF8&reviewerType=all_reviews