There are two basic ways of removing wax.
You can either freeze it, then scrape it off, or use some sort of solvent such as Goo Gone.
Ironing wax between sheets of brown paper is an old housewives trick that can cause more problems. Often the heat of the iron causes the wax to melt into the fabric, leaving an oily stain which then must be removed. Heat can also cause certian dyes in coloured waxes to also stain fabrics.
For grout, I'd try resting some ice cubes or anything frozen to see if it can be scrapped away, then use a solvent to clean up any reside. You probably will have to scrub the area with a good detergent and water solution to remove any solvent residue.
Same would go for the appliance, just make sure you do not scrape away paint, and that any solvent used will not harm same.
L.