Should I sleep on my hair or put it aside?
More tangles = more dreads.
Yes. Sleep on it.
Try using a natural dish soap -- you'll get the same effects without frying yourhair (as much, at least. haha)! I used to use Ology dish soap from Walgreens once a week, and it worked very well. Better than baking soda.
Definitely follow it up with an ACV rinse, though. It's still a tad drying.
You're definitely not alone. I've heard of countless other dreadies that choose not to wash, but I personally don't think it's the best idea. As you can see, a lot of other people here feel the same way about it, too.
Do you need to wash your hair every day? No, no, no. Especially not if you have dreads.
Do you need to use shampoo/conditioner when you wash? Mmmnope, baking soda and ACV are worlds better for you, the environment, and heck, even your wallet.
But washing your hair is, and hopefully always will be, part of maintaining proper hygiene. Washing a couple times a week with something that balances your scalp's pH dramatically decreases sebum production, but it won't make your hair/scalp invincible. There's still dust, germs, and other assorted forms of grime in your house, at your place of work...everywhere you go. It may not look like it's in your hair, but it is.
Is the "X" pattern where you criss-cross the ends as you work your way down the dread? I did a wrap like that about a year ago -- inserted it through the top of the dread and criss-crossed it all the way down. It hasn't budged, and there's no mold or icky stuff. Maybe the trick is to not wrap it too tightly...if hair is poking out, then you may have kinda choked it or something, haha.