I recently made a salt/perc lamp and after a few runs I noticed that small blobs started sticking on the glass. Can this be corrected with more surfactant or will the globe have to be redone? It's a 52 oz. and I used about 3-4 drops of Ultra Palmolive Pure + Clear detergent as a surfactant. I'm wondering why the blobs didn't start sticking on the first run?