Good Glaze Gone Bad

I guess this happens to every potter. Glaze troubles, the first was a new glaze called Bi Doro, kind of glassy and green, it looked really interesting on other peoples pots, who had dipped twice, what happened?

The second one is my favorite glaze, Shiro-Matto, but I've noticed that after being used in daily life it will start to show cracks! Arugh! So sad.... That can be considered an interesting feature of the glaze to some but I was taught that this makes it unsafe for food. Se la vie. Also on this run of large bowls it had these little bubbles scattered around, making them even less food safe. So sad to see a good glaze go bad like that, what to do?