Depending on the type of candle wax and mold she is using she could try putting them in the freezer for a few minutes. Sometimes they pop right out!
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Silicone spray works also. I'm a sprayer :-)

http://images.peakcandle.com/albums/userpics/10003/normal_siliconespray.jpg

Have her look for a can similar to that in the auto department at any Wal Mart type store. Or order from:

http://www.peakcandle.com/products/Silicone-Spray-Lubricant__A1018.aspx

(They have fantastic customer service!)
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I have never tried this but petroleum jelly or Vaseline might also do the trick.

I as well would also recommend silicone spray, bear in mind they also sell silicone spray in different colors.
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For any candle, regardless of the wax type, a stay in the refrigerator usually shrinks them slightly so they pop right out of the moulds. Watch how long you leave them in the fridge, though. If they are in metal moulds, leave them in the cold just until the mould feels cold. Longer and you may get thermal shock cracks.

If the cold doesn't help try using a regular cooking spray like the original pam, none of the flavored stuff.
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