I've heard how soy wax burns slower than petroleum-based wax.

I've heard soy wax leaves less residue/remants than petroleum-based wax. I don't find this true at all.

(Et cetera.)

So, the major problem I'm finding with soy wax is how hard it is to remove the leftovers from a container!

Putting it in the freezer to harden up & pop out like for petroleum-based wax doesn't work.

Removing the thick greasy leftover, which reminds me of peanut butter, takes so much scrubbing & soaking with a dish detergent like Dawn or a cleaner like De-Solv-It or Goo Gone.

Is there an easier way to clean up the soy wax residue/remnants?

the easiest way for me to get candles out of holders is to put one or two drops of water into the candle holder before placing the candle in the holder. when you are ready to remove the candle it will pop out with no trouble and nothing left behind.