Stella, have you tried writing to or phoning the Regal company? They should come up with the answer for you really quick, as they should have "experts" for their machines at hand to answer the questions. I really hated it when my bread failed. Half the time it was good, but after that either it fell and was a "heavy" loaf or else it rose so much that it stuck to the lid, the inside, etc. (I had a DAK machine.) Good luck.