Uh, oh! Starting to feel inadequate here. 🥴
Except for spot cleaning, I've never cleaned or sanitized any of my roller bags. I do wash any other kind of bag that I can in the washing machine on "tap cold," even some that say not to. That includes backpacks, totes, purses and packing cubes.
And I also put dryer sheets in all my bags or with them in the flip-top boxes where I store most of my smaller travel packing gear. I also put them in some of my shoes at home, largely to keep potential spiders or scorpions out. We have a service that sprays to keep them away, but nothing is 100%.
I was doing the dryer sheet thing even before I met a woman who was waving one around where there were bees. She was highly allergic and said that it helped protect her from stings. Thanks to her, I started putting one on my dog's collar and in the band of my hat for our walks in the spring when the bees (mostly Africanized) are out gathering pollen from the amazing yellow blossoms of the Palo Verde trees that surround us. If out early enough, the bees are asleep, but once the sun is up, every tree is buzzing. Occasionally a scout would "bee-bump" a warning that we were getting too close. But mostly they had a job to do and stuck to it.
As for shoes not in the house, except for muddy or wet shoes or barn boots, I never heard of that until I met someone from Switzerland. None of the places I lived until I went to college had carpet. Carpet or not, there would be rugs outside and inside the exterior doors to wipe our shoes on before moving farther into the house.
I guess it's just a matter of how you grow up. I'd never leave my shoes outside the house. In an attached garage, mud room or just inside an exterior door, sure. We may change shoes when we get home from errand trips in the car, local walks on our dirt roads or just walking out on the dirt that surrounds our house. That's for comfort and support (doctor's orders) on our concrete floors. By the time we do that, we've already walked on at least 20-30 feet of rugs and our shoes are clean. 😉