You can only correct it before the wax sets. Most people are the same way.

• Pyotr RyabinSir, do you know what the candles for that room cost in a month?
  Mikhail FyodorovichCheaper than a single seal.
  Pyotr RyabinI set that price.
• Granny SonyaIf your hand shakes, stop, old man.
  Mikhail FyodorovichIt's not my hand shaking, old woman. It's the candle.