English for Today by Ganiu Abisoye Bamgbose (Dr GAB)
IN THE MIRROR or AT THE MIRROR?
For almost an hour, she was looking ~at~ the mirror (nonstandard).
For almost an hour, she was looking *in* the mirror (standard).
When you stand before the mirror, you are looking in the mirror, not at the mirror. However, you can look at yourself in the mirror:
For almost an hour, she was looking *at* herself *in* the mirror. ✔️
GAB

No comment