Hi! I need some help!! I just got a gallon of porcelain slip. When I started using it, it was too thin and runny for me. My slip trailing wasn’t working, and all of the slip just kept dripping. So I decided to thicken it up. I put some epsom salts in water and made sure they were dissolved. I then add 2 spoonfuls of the water to the slip. Now the slip is a little too thick, but I really like this consistency. But, there seem to be clumps in the slip. It is no longer smooth. Does this mean I just need to mix it a lot to get the clumps out? How would I thin it again in the future?