Ok so it looks like the person at the stationary store didnt have a clue what they were talking about because they told me the clay I bought was oil based (didnt say on packet so I had to ask) and now that I have made my mold the stupid clay has dried up and is becoming hard to remove.
Anyone have any tips on how to remove the dried on stuff now? The clay has dried completely and is stuck to both the plug and mold, I can go at it was something like a small screwdriver but I think not only will I do a crap job at it but will also wreck the mold
i doubt you will ever get it all off and retain the shape of the mold.
get a pressure washer,jet wash on it