Computer doesnt see my flash drive any more?

Ok I've been struggling to get my sandisk cruzer to work for 2 months now.

I tried to format the drive to rid it of the U3 & I couldnt seem to do so. I also couldnt seem to remove the U3 via any un-installer

Now I've formatted the flash drive so many times my computer doesnt even recognize it?

Any idea on how to get my computer to see it again?

Try it on another computer first, see if it works there, if not, then it may be a problem with the drive, not the computer.