We have some fire alarms that used to screw into the ceiling except that when taking off the normally detachable part, the whole thing has literally ripped out of the brittle plaster. Screws are no longer an option because where they are placed on the fire alarm, there isn't enough ceiling for them to actually screw into. There is however, still quite a bit of overlap between the plate that attaches to the ceiling and the ceiling still.
Is there any sort of non permanent glue, non screw way to stick them back to the ceiling? Not looking for a super long term solution, but in the mean time I would like the fire alarms to not be just hanging from wires through a ragged hole in the ceiling! Something semi secure would be nice.