I used to put eggs and water on the stove to boil and would never bother to stir them. While this was lazy and worked for hand peeling with a small margin of broken eggs, it did not work with this peeler. 50% were shredded or showing the yolk. Following their instructions resulted in only 1 broken egg out of 6 dozen. Following the most important part of their instruction - adding eggs to boiling water, stirring for 5 min, simmer for 5 min, cool in cold water - resulted in 5 broken eggs out of 9 dozen. Finally clean up is easy. Just rinse in the sink. Might not be the safest but I rinse the rollers while it is still turned on.