I haven't had the RGP slip off either, it is normally really comfortable on the soft one and only slightly moves!
When the soft lens gets dry I put in a drop of Blink which does the trick. I use Optifree for the soft lens and Boston or Tescos own solution for the RGP. Tescos cleaner is good as well!
I wasn't asked in Moorfields about trying a Rose K either I only knew it was one when I asked yesterday! It is seen as a RGP as it is the same material and I was told that it is good for post grafts.
Hoping your lenses carry on with success!!
