I'm a little confused on how to lean by EGT. The POH for my Cessna 162 says to lean the mixture until it reaches peak EGT. But what is peak EGT? Is that when the EGT indicator reaches the very top of the digital EGT gauge? I thought so but when I was out flying and slowly started leaning it, the RPMs dropped long before the EGT gauge got to the top and as soon as the RPMs started to drop, I richened the mixture up a bit. Any insight on this would be appreciated as the POH doesn't seem to define exactly what temp peak EGT is. Thanks!