I Still Know What You Did Last Summer - Disappearing Steam
When Julie is on her own in her hotel room she is having a shower. This is about half way through the movie. She can hear something so she goes to investigate. She looks in the mirror and it's all steamed up, I think she wipes part of it. When she walks away to investigate the mirror is perfectly clean without any steam or smears. She later finds the body hanging in the wardrobe.
on 04-22-2003 and