I forgot to add, if you're switching to gentler cleansers and/or cowashing, you can wash as often as you need.

When I was using low-poos, I couldn't have washed every day... it would have dried out my hair. Now that I'm cowashing I probably could cowash every day, but I don't need to so I do it every third day.

Another thing you could do is mix it up between cowashing and low-pooing, like cowash 2x in a row and then low-poo. Low-pooing every day may be drying, but do whatever works for you!