is the wax behind the keys or just inbetween and on top of them? Candle wax melts at 190° F. Itf its under the keys you may be able to pull the keyboard out of the laptop, suspend it somehow upside down inside an oven set at a low temp and see if it will get off the key arms. Be very careful here to not melt the keys in the process. It may free up sticky keys. I don't know of any solvent that will work to remove the wax.
A opposite procedure is to freeze the keyboard for a while and hit the keys to break away the wax from around them. If the wax is on top or in between the keys freezing will let you peel up the wax with an exacto knife. Maybe enough to get the KB working.
If nothing else you can buy another KB at places like this.http://www.sparepart...,Keyboards.aspx