"The problem: Perhaps it was too frozen? The directions said to leave the jar in for an hour and than jokingly, the author notes that s/he left in for days by accident. So did I because I totally forgot about it for about 4 days."
After removing the main chunk(s) of wax, there will likely still be a residual sheen of wax on the jar. This can be removed with hot soap water, baby oil, or olive oil. If there is still a strong smell leftover from the candle that you want to get rid of pour baking soda OR vinegar (NOT both) in the jar and let it sit overnight and wash it well in the morning.