Rhinoplasty scabs should be improved with cleansing

The hydrogen peroxide can help break up the crusts. But you could also be doing some nasal saline rinses to keep things moist and allow the crusting to break down. Your surgeon can also help take some of the crusting away with instruments. Sometimes depending on what was done, your airway may be too open and this can cause a dry nose syndrome where the inspired air is too easily passing through your nose causing it to dry and also possibly get infected. Your surgeon could help in determining this possibility.

 If you are one month postop, your incisions are healed and your doctor can be more aggressive in removing the scabs that aren't responding to peroxide.  They will be happy to help ou out!

It's fairly normal to have some mild scabbing inside the nose after rhinoplasty. When you irritate the lining of the nose it generates mucus and can crust if too dry. Sometimes, if the scab is too large it needs to be debrided physicially. Once in a while, a stitch may still be present which can collect crusts as well. I would have your surgeon take a look at it.