The stick checks for viruses. My "gripe" ( as Fix...

The stick checks for viruses. My "gripe" ( as FixMeStick calls it) is because they advertise a stick with a cap on it to protect it, and even stress taking it off, etc., in their instructions that come with it; then when you get it there is no cap on it -- but one can readily see the markings where it should have been. I want to prevent dirt, dust, etc., from entering, but I am told by FixMeStick that dust, water, dirt, etc., cannot hurt it. I cannot begin to imagine that.