Hi Carmen,
Martin has now been out of treatment since October last year. His taste buds had much improved by January then he got a stomach bug and they all went. Then they came back and last week he could eat most stuff except fruit and Sunday night he was violently ill (a stomach bug again) and his taste buds have now regressed. Apparently everything tastes like stamp glue or plastic. I think it's the being sick and the dehydration that caused this, because it's now happened twice. It's a bit like a seesaw it seems to me this taste bud healing.
Just be patient they should come back. 6 months is really not a long time as far taste buds are concerned.
Good luck