Hello Daniel,
Its a while since I've noticed that the cache folder at media\com_hotspots\cache
Blows up beyond proportion, I delete the files all the time to keep it in check.
It actually creates .js cache files without control. Here is a screenshot from FTP after about 4-5 days since I deleted all cache:
http://prntscr.com/bwu4ug
The "marker" and "config" folders there a bloated up too, but they don't take that much space, about 20mb..
Please advise us on the issue.

Thanks