I shouldn't even bother changing the sheets, but old habits die hard.
6 seconds sound clip from the Psycho (1960) movie soundboard.
You can hear this line at 01:06:34 in the Blu-ray version of the movie.
Quote context
[...]
- Look at the picture, please.
- Sure?
- Yeah.
- Well, she may have used an alias.
- Marion Crane's her real name, but she could've registered under a different one.
- I shouldn't even bother changing the sheets, but old habits die hard.
- Yeah.
- Well, as you say, old habits die hard.
- It's possible, this girl could've registered under another name. Do you mind if I look at your book?
- No.
[...]