Local cache will not clear. (20Gb!)

I have been experriencing slow check in times recently sometimes 15mins for 15mb assemblies.  The file appears as if it is checking in but then hangs up (PDM not responding) when I try doing anything else.

After investigating it looks as if my local cache is now 20GB! and will not clear when right click- clear local cache.

Any suggestions greatly appreciated.

Thanks

Andrew

SolidworksSolidworks Pdm enterprise Pdm