You are spending way too much effort trying to analyze biological factors and hypothetical exposure that are extremely unlikely. All patients in the world's busiest HIV/AIDS clinics have had the traditional, known high risk exposures: high risk sex, shared drug injection equipment, birth to infected mothers, and so on. There are no patients who give no history of such exposures. (When such persons initially give such stories, invariably they are shown to be false -- that high risk exposures actually occured after all.) If exposures like you describe actually occur in measurable numbers, then obviously there would be occasional patient without known high risk exposures. This is exactly the kind of evidence that, in the early to mid 1980s when AIDS was newly spreading in the US and Europe and HIV hadn't even been identified as the cause, scientists were able to reassure the public that it is not transmitted by non-intimate personal contact or in the environment. Because no infected persons had not had high risk sex, shared needles, etc, it was clear that there was no risk without such esposures.

In reply to these specific questions you ask, just try to logically analyze the the probabilities. IF someone somehow left behind a bit of blood on a mirror, door or window; IF that person had HIV; IF that HIV infected person had a high viral load, e.g. not on treatment; IF before the blood had not yetdried (e.g. within a minute or so); IF you didn't notice the blood; IF you were unlucky enough to touch that spot; IF you immediately rubbed that finger into an open sore or your eyes, I suppose you might get infected. But of course this is rank nonsense. This sequence of improbabilities simply is never going to happen.

I'm going to ask that you no ask about any more such "what if" scenarios. Each and every one you might think of undoubtedly will have the same answer. The way for you to avoid HIV is to not have unsafe sex with new or high risk partners, and not share drug injection equipment with anyone else. That's all. Otherwise forget it.

Regards--  HHH, MD

Your questions suggest you may have OCD of the type that shows up as abnormal fear of contagion. It can be an early sign of serious mental health disability. (For an excellent example of where it can lead, see The Avioator, the excellent film biography of Howard Hughes.) If these irrational fears of catching HIV in the environment are seriously affecting your life, as they seem to be, you should seek professional mental health counseling. I suggest it from compassion, not criticism.

But please do not ask any more questions about it on this forum, either in this thread or a new one. We cannot help any more than we already have.