I have been wearing my hair in this donut bun for the past week or so.
When wearing this style I cow ash my hair every 1-2 days. When cowashing I simply rinse my hair and reapply my conditioner and detangle with a shower comb. I then brush my hair up into the position I want my bun to sit and then wrap a ponytail holder around it. I do not rinse out the conditioner. I use it as a leave in and my hair loves it. Then I put on my bun filler and tuck my ends under.
I apply my sulfur oil to my scalp with an applicator bottle and massage in every 2-3 days. I found that I need to oil my scalp regularly or I get dandruff and itchy scalp. This will remain a big part of my hair regimen, as the sulfur really benefits my hair and scalp.
Slowly but surely my hair is filling in little by little. The little hairs around my hairline are blending in much better than it did a few months ago. Wearing buns back then caused more breakage because most of the hair did not fit into the ponytail. But now I can wear them successfully and not experience any breakage.
I like to bun on wet hair but you have to be careful not to put it in too tight. As your hair drys it contracts and after a few hours you might need to loosen the holder so it does not cause too much stress on your edges.
I also vary the placement of the bun every time I put it in. You can go higher, lower, or towards the side to prevent breakage from wearing the ponytail holder in the same place all the time.
I remove the bun at night and wrap my hair up in a scarf to keep it protected. If I feel like I cant wear a loose ponytail I braid to the ends and remove all holders, rinse and repeat in the morning.