Why might POXIMIX PARA INTERIORES be setting too quickly? (less than 15 minutes to mix and apply)

Residue of cured material in the bucket and on spatulas can accelerate the setting of POXIMIX PARA INTERIORES. If you notice that it is setting too quickly and this makes it difficult to handle, clean all the materials carefully, making sure they are free of any product residue. Once the materials are thoroughly clean and dry, mix again as instructed.