Should both the genitals and butt be cleaned during a wet diaper change?

Between stories, ABDL vids, and actual changes I've seen IRL, there doesn't seem to be a clear-cut method as to how to change a wet diaper. In some cases, only the crotch is wiped. In other cases, both the crotch and butt are wiped. In some cases, only wipes are used and in others, only powder is used.

I ask because I'm a writer of ABDL stories and often wonder which method is more realistic.

Are their variables (amount of pee, time in diaper after wetting, etc) that determine whether both areas need cleaning?

Also, is lotion necessary for wet and messy changes or will powder suffice?

I'm going to say this as an urinary incontinent person that's not into AB. I think personal hygiene is at most important period. It doesn't matter if you just wet a diaper. A total cleansing front and back is the best thing to do. During all diaper changes I remove the diaper, use adult disposable wipes all over the diaper area. Appy rash cream ( lotion) and a little powder. I basically use coconut oil as a rash cream and it helps with chaffing. I use powder for odor control and sweating because I use disposable diapers with plastic backing.

Always wipe entire area. Always front to back. 30yrs incon experience to vouch for that. Then cream depending on situation. Powder at all times.

I wear for fun 24/7 and almost always have a wet diaper to one degree or another. From about 11 p.m. until 9 a.m. or so I have a fully soaked diaper on. When I change diapers I always clean front to back. I use a men's body lotion but have never used a powder. The body lotion has prevented me from ever having a rash.