Leckert, is Blake an obvious pooper? e.g enough noises to make you aware of when he is pooping? You're prolly doing it already, but i'd be changing him IMMED he poops.

At one stage as a newborn, bilby had irritation around the anus too and it turned out to be i was drinking too much fruit juice, she was getting it through my breastmilk, and then when it exited her body, it left her with a sore bottom. Up til then, i had no clue, that me drinking something i regarded as healthy (i had CRAVINGS for oj at the time), could cause her physical distress.

ANother time, i was drinking way too much coffee, adn that caused her problems too. (i was so stressed out at the time, i felt i NEEDED that amount of coffee just to keep going - bilby was not sleeping much and i was so scared of going to sleep when she needed me, when she and i were alone most of the time).

So, i'm raising the idea of what you're eating, that might possibly be affecting Blake's system.

Cloth wipes and water would be good. The propylene glycol in most disposable wipes could be irritating Blake's skin.

Sometimes bubs have an adverse reaction to teh STAY DRY fabrics e.g the microfleece and suedecloth many pocket and all in one nappies are lined with. That happened to us at the 14 month mark, i changed over most of our stash to natural fibre inners, and the synthetic inner nappies i just COULDN"T part with, i lay in a separate liner made from two layers of cotton velour. Cheap solution that worked.

i ahven't read the last few pages, but i'm guessing someone would have already suggested the mild wash detergent, and to use very little of it, angle.

good luck working it out Leckert. SOrry if i'm repeating stuff you already have tried/have been told/already know - i don't know what you know already, so just threw in what came to mind, as i read your post.