In addition to the great advice from Anjuli_Bai:
Do you use the one pair or do you have more than one pair on rotate? I generally found that my shoes fare better if they have more time to air-dry, and if possible you could look into having 2 pairs on the go at the same time, and rotate, so that you have 3 days in between each wear for each pair?
Also maybe look into jet gluing / shellac your toe box, as you mentioned you could feel the floor with your big toe, maybe the box is going before the shank? Have a search on the forum first, I'm pretty sure there are some threads covering this. I've always done the hardeners on the inside of the shoe instead of outside to avoid slipping, and the type of hardener you use will be personal preference + trial and error in general I'm afraid..!
Hope this helps?