hambones

I am certain there wasn't a basement. Had there been a fire should I have gone upstairs? How far? Should I have told the people I passed coming down that they were going the wrong way?

I fire my kiln several times a week. I fire low fire clay and glazes (1915 degrees). Consistently on one shelf the kiln wash flakes and needs to be lightly scraped and repaired. If I completely re-coat this shelf it does this same thing. I have tried different brands of wash with the same result - which I expected. I cannot figure out why the wash doesn't want to stay on this shelf. Any ideas? (All the other shelves rarely need any attention.)