Press Pause at the beginning of this video to read the reasons why caring for a bird with Scissor/Cross Beak in this way is necessary.
Because this is a physical deformation that can impact proper eating and drink, this procedure becomes imperative for the birds health and ability to thrive. It is simple and painfree, the tools needed are a pet nail clipper and a dremel tool. A wet cloth to clean the area first and an extra set of hands are beneficial at well. I often have a stop quik powder on hand incase I was to hit the quik and cause bleeding. Work slowly and mindfully about the anatomy of this area and you wont have an issue.
Procedure needs to be repeated twice as year or as needed. Any questions or comments please drop them in the comments.