Change how you approach brooding. I think new keepers are more inclined to coddle chicks when it really isn't necessary.
My first batch was brooded inside, under a heat lamp, frequent cleanouts, etc. - a typical starter's set up. My second batch went directly outside, with a mama heating pad turned off at 4 weeks, and zero cleanouts of the brooder (though I did take them into garage when it rained) - to clean the brooder I simply moved it. Third batch was similar to the second but I turned off the heat sooner and left them out even in rainstorms... I just built up the brooder floor litter higher to keep it from sitting in any puddled water, and it stayed dry enough just like that.
I've had very little issue with pasty butt with the latter batches (usually if they have it, it's from shipping/being at the store, and it clears up immediately). I also don't use medicated feed but only the first batch of chicks developed coccidiosis, which I attribute from being raised inside in a more sterile setting.