new tears of happiness from happy ghast to change his recipe

We know that dry ghast can be created using bone blocks and ghast tears, but this prevents players from exploring the nether and searching for the soulsand valley biome.

One way to make the dry ghast renewable is to use happy tears that the happy ghast will release when fed with snow.

So to have a lot of dry ghast you will first need to have already raised a happy ghast to adulthood.