See, I am not following your logic.
Say I need to go to the store for a few essentials. I wash my hands for 1 minute before leaving the house. I put on a N95 mask. I put on a pair of nitrile gloves. I drive to the store, get out of the car (it is sunny so the car door handles are probably OK). I walk into the automatic door opening thing without touching anything.
I scratch my nose. Should be ok, the gloves have not touched anything contaminated. I proceed to the milk isle, open the glass door (CONTAMINATION WARNING!) and get a gallon of milk. I carefully take off the gloves and toss them, putting on a new pair (this is tricky as I have to hold the milk between my knees because I didn't want to touch a shopping cart or basket). I decide this is ridiculous and just use the instant checkout thing for the milk. I carry the milk to the car, set it on the roof and dispose of the 2nd pair of gloves, putting on a 3rd pair. I scratch my nose again (damn itchy nose), grab the milk, and get in the car. I drive home, talk off the mask (stick it out in the sun? or throw it away?) and dispose of the gloves before opening the front door.
See? Simple.