Early in her life, our cat devised a brilliant method to ask to come in. She plucks the weather stripping at the edge of the door. This sends a surprisingly sonorant POP throughout the house that can be heard on any floor.
She refuses to meow and we tried endlessly to get her to learn one of those cat doorbells at nose height. She will not learn.
We've replaced the weather stripping a couple of times already, and are about to do so again, but are hoping for a long-term solution. Whether the solution allows her to keep popping something that's not weather stripping, or removes the option so she's forced to meow or learn a cat chime, we don't care. We just don't want this to happen again:
As you can see, she's capable of stretching to 2-3 feet off the ground, and if we only blocked off the bottom foot I'm sure she would stretch every time.