I’ve had the same shrew in my garage and siding for the past couple of years. Ideally, I would like to capture and relocate her. Here is what I’ve tried so far:
- Foam gap sealer.
- Copper wool: I used it to plug some holes because they can chew through almost anything else. However, copper wool is not very practical with the access points having since been elongated.
- Garbage: She had gotten into a garbage bag and even after being placed in a garbage can until she could be relocated, she was able to escape.
- Glue Traps: I have been fed up enough on a couple of occasions to use glue traps. She made a powder of the dang foam gap sealer and made the glue trap shrew-safe.
- Automation: I put down a “rat on a trap” toy which jumps and shrieks when triggered by sound or movement. She’s not falling for it.
- Humane traps: She’s too small.
- Sonic deterrent: Expensive / not rated for shrews.
- Yelled "BOO!": She laughed at me.

Any suggestions before I go spring-loaded?
Unfortunately, a cat isn’t an option because of allergies.
Shrews are one of the rare few venomous mammals out there, otherwise I wouldn’t have a problem keeping her as a pet, however demonic-looking she may be.

This is just my method of sealing food for long term storage in food vacuum bags using 5gal bucket Mylar bag oxygen absorber/hand warmer, vacuum cleaner and cloths Iron