Two things:
1. If you are using drops 3x a day you should be sure to use preservative free. The preservatives themselves can cause irritation.
2. If the problem does not resolve, you may want to have a rheumatologist check for Sjogren's. There appears to be a relationship between celiac and Sjogren's.
I found Italy has the most informed restaurant workers. Apparently they are required to learn about celiac in their training. I felt in very safe hands there.
Also, I highly recommend Norwegian Cruise Lines. If you pre-notify them, and eat in the dining room, they will give you extra special attention.