Seedling likes humidity dome?

My seedling only grew when I put the humidity dome back on and grew even more today. The thing is after I put it on mon-tues when I took it off it bent over i put the dome back on but it was stunted until today when it grew a lot more. My question is where do I go from here? I’m a little scared hardening off won’t work I’m feeding it silica recharge and photoplus so it’s outcompeting any bad bacteria do you think this will work in hardening off also? And how long should I leave the humidity dome on another week or 2 ?

P.s I know it’s weird your suppose to take it off when they sprout which I did but no growth until I put it back on

the pic I attached is a pic after I took the humidity dome off the 2nd time it took an hour to end up like that and it was 90 degree angle 2hrs later (when it comes to hardening off question)

This is how big it was the day before Monday that was Tuesday btw

If my rooms humidity is above 55% I don't use domes but if lower I would suggest using a dome until plants have established with both cuttings and seedlings. They need a lot of humidity to not potentially take damage from wind, dry air etc..