Heidi MacLachlan Method I soak the head in hot water taking care not to immerse completely. You do not want to get water into the head or on the eyes. This will loosen the wig enough that you can pry it off. Any remnents should get gently "shaved" off with at straight blade razor. Test fit the wig for fit and position, then take a white fabric pencil (don't us a pen, or regular pencil) and trace the edge of the wig all around the head. Spread glue, (I use Tacky craft glue or Elmers with good results) and spread to the "edgeline" with your finger to create an even coat. Turn the wig inside out and place the inside (webbing of wig) on doll head. Adjust the wig so that it's on the doll the way you want it. Then I gently press to secure. Allow to dry overnight. Rub off any visible fabric pencil lines. Joan Wilson Method I've rewigged quite a few Heidi Ott dolls and several Betsy McCalls (I bought two Betsys, two Lindas and two Barbaras). Gently pry the old wig off with a medium size screwdriver. If the wig won't come off easily, you may need to soak the doll's head with Twin Pines 9-1-1. And, in desperation, shave it off since you're going to cover it anyway! Measure the doll's head. Most wigs comes in multiple sizes such as 10-11, 12-13, so I'd really suggest you take the doll to a shop that sells wigs (or to a doll show). I put the new wig on with Elmer's White Glue. The wig will stay secure, but can be removed very easily if you want a change. Spread the glue in circles on the doll's head (small amount), turn the wig inside out and place the inside (webbing of wig) on doll head. Adjust the wig so that it's on the doll the way you want it. Do not press down - the glue will penetrate the hair and you'll have clumps. Allow to dry overnight. Linda's Method I've re-wigged three times, once with an HO, once with Kirsten and once with a no-name rooted hair doll. I ca NOT guarantee that this would work with any and all dolls, but these methods worked for me on those three dolls. Measure your doll's head by putting your tape measure snuggly around forehead to nape, then purchase the appropriate-size wig. for wigged dolls ONLY--heat water almost to boiling, then carefully gather up existing wig so that edges of the wig are exposed all around and gently pour the hot water around the edges of the wig; don't burn yourself!! This should melt and loosen the wig glue and the wig should come off witha good yank. If you do this carefully, you may be able to reuse the wig. Then dot glue over your doll's now-bald (!) scalp and position the new wig. Do this quickly and accurately so that it doesn't get stuck on wrong and either give her a high forehead or cover her eyebrows or ears!!! Also watch the water is not so hot that it melts or discolours the vinyl/plastic or whatever the doll is made of. for rooted-hair dolls--let me say that most doll enthusiasts will tell you to think verrryyyy carefully before wigging a rooted-hair doll. Having said that, I will add that the one I did had such dreadful hair that even baldness would have been an improvement!!! Anyhow, cut the hair as close to the scalp as possible. Some folks say you can shave it but I tried and found it to be an exercise in frustration. Then attach the wig as with the wigged doll.