I have to drive to pick up food supplies, it is 13km to nearest shops. A friend and I discussed the various lengths necessary to avoid taking unwanted passengers home. Apart from the packaging that may have been handled by other shoppers minutes previously to you we came to the conclusion that car keys and once inside the car the controls, steering wheel etc would be a possible store for covid 19.
In the car you let down your guard, people pick their noses or rub their eyes. Last Wednesday was the last time I shopped and I had to train myself to keep my mitts off my face until my return home, I actually found it easier than I thought it would be.
The next time I shop I am going to hang a small bottle of alcohol gel wash off a belt loop and the moment I store the trolley in its bay I will be washing my hands with the gel before touching my car keys or unlocking my car.
Whether that procedure will increase my protection I cannot say but at the least it will keep the need to be vigilant in the front of my mind.
As for vinyl examination gloves, I would say if you remove and bin them immediately after your last presumed hazardous interaction and they have not touched any of you or your belongings then I would say they are effective, it is the way you use them that is of importance. Even taking a pair off, the first glove is easy, the second glove not so easy without the contamination of finger or thumb removing it.
You've just unknowing described why they are not a good idea for everyday use.
When do you intend to put the gloves on ? before you walk out the door? before you get your car keys? the list go's on.
It's impossible to be clinically clean in none clinical environments. You are going more harm than good with gloves. Just wash your hands every time you possibly put yourself at risk. The virus is a bad boy once it's in the body .Outside it however it's like a little kid when you mix it with hot water and soap. They both don't like it.
If you use hand gel as you say I take it you do your shopping wearing full PPE and have carried out full aseptic technique thought.
You've got a personal scrub nurse in the boot to help you. Your car has been though an autoclave and has been inspected within an inch of it life by an eagle eyed theatre sister. (even Cold-19 would run a mile from theatre sister)
You just don't know what the "last presumed hazardous interaction" is. It's not like a operating theatre where you learn that it's ok to touch anything just along as it's not green.
Just wash your hands often and if in doubt just do it. I've covered the how's and when already on here.
PS
If you think taking off gloves is hard then stay clear of using a fully sterile pair. Getting the 1st one on is an art in itself and once you get both on and remember you've forgot something then your really stuffed. (For nurses that's when junior doctors come in handy)