Love Frankie's hair. It's very cute
If you want, you can order a set of lower arms from Mattel so that Frankie isn't one-armed.
You can take tweezers or something similarly narrow with a pointed (but not sharp!) end and scrape all the glue out of the head. It makes the rerooting process go faster.
Or drip a few drops acetone nailpolish remover into the head then run warm soapy water through the head.