In this video I go over my ideas on what you can do to repair thinning dreadlocks, especially locs that are thinning so much they are about to fall out. Basically, I recommend not twisting your hair so much.
This only works if it’s not too late. By too late I mean your roots are already severely damaged. If it is too late, then your two remaining options are to start over or pay for a loctician to repair your locs.