Can someone help I have bags of gunge but unsure how to mix it

Bring them to my house!

More seriously though....i think there's good advice on here somewhere. I think vigorous mixing with hand-hot (but not too hot) water, and keep stirring, longer than you think. It will eventually 'go' and really quickly go from watery slop to thick gloopy gunge. I'm so jealous! Have fun

What type of gunge?

Some you add water and mix easily by hand, other types need to be sifted into water and mixed with a blender/drill to avoid lumps.