Glad she is doing better.. I would try using an algae scraper to remove the slime off the sides of the glass, as that could be affecting her grasping it.
I know personally you are caring for your fish the best you can, and that it wasn't your fault that Lucky ended up in your tank. As I mentioned before in the group - you are doing your best and learning as you go and Lucky is being cared for and is healthy. That is what matters. She is a fish, and even though we wish differently, fish don't think nor feel like us and doesn't understand like us. To her all that matters is the water is clean and she has plenty of food to sustain her. And that is what you are doing.. and keep doing it because the alternative for you is to flush her and that is not an option. So please keep that in mind people, sometimes we can't control what we are given, but we can control what we do with what we are given and this is one of those cases - maybe not the "recommended" setting, but it's not a bad one either.