Before a feed was what I was told to do. 30 mins to dissolve is not the case! They are very easy to dissolve the issue is that little balls in them do not dissolve and cant be crushed, so dissolving all you ar doing is dissolving the enteric coating.
I personally found this very hard to get into DS1 so I went back to GP and got a script for Losec suspension which has to be made up in a compounding pharmacy and tastes terrible but they can flavour it to make it slightly better.

Hope it works for you.