uefi os

Hi until a few weeks ago my hackintosh worked perfectly and the clover started from "Uefi Os HD ....". at some point the clover did not start anymore, so I made a usb pen with unibeast and clover and "Macintosh HD" work fine .. only that no more boot options come up with the word "UefiOs Hd...

Not sure if this has been answered before, I wouldn't know what to search otherwise. I've been starting to notice a build up of 'UEFI OS' when I'm prompted to select my boot drive. Furthermore, I believe this eventually prevents my system to even post and I'd have to take off everything within...