You really don't have to let them sit so long (depends on how hard you want them)but do turn them off as soon as the water boils. When ready, drain the water and then put lid back on pot, shake to crack the shells a little and fill with cold water, easy to peel. The other two things that I do is, add lots of salt to water, this will help even new eggs easy to peel and also add vinegar to the water and if they crack while in boiling water, it will cause the eggs to gel, kind of like doing poached egges.