Older snakes tend to take a little longer to shed.. Just be worried if her shed cycle takes two weeks or more. If not, just let her do her thing. If you keep stressing her by checking on her so much, she might retaliate... (ie CHOMP on you)
And yes, she does look like she had a retained eye cap.
I do not use bark, but if it smells like bleach, I would not suggest using it at all.. The chemicals are unhealthy for your snake.
I think that was all your questions.. It was rather hard to read your big block of questions.
Good luck