It looks like you need new elements. With your recent relay replacement, new elements will make it like a new kiln....other than your controller there is not much else to worry about!
are you crash cooling your kiln?9 letting it get to the anneal hold with the lid open) That can cause the bricks to crack and eventually start to fall apart.
No I am not crash cooling the kiln .
Generally speaking I do an extremely conservative annealing, and before, I allow the kiln to cool down to the anneal temp.by its own ability [sometimes 515C, sometimes 482C]
I do pip sometimes, when the temp. is going down, but this is really no more than 2 seconds..
