I have a real problem with germs known as germaphobia. I do not condone anything to go in the baby's mouth that should not be there. The only things that go into my child's mouth are things that are meant for that purpose, such as teething toys, an they must not touch the floor for any length of time.
Should this happen, I take a baby toothbrush, brush the child's teeth, and then I disinfect the toy. The child looses priveledges to that toy for putting it into his mouth for a time. I do this as soon as kids start putting things into their mouth, even at the age of six months. Taking the toy away is enough to send the message that that is not acceptable.
Edited to ad:
Teething toys are returned immediately after disinfecting both child's mouth and the toy. However, other toys not meant to be in the mouth are taken away. I though I should clarify that. The message that I want to send is that the floor is a filthy place, and things that go into the mouth won't touch it, and that toys that do not belong into the mouth will never go there.
To avoid this much of the time, I am all for a play yard--fencing that you can make as big as the entire room to keep the child safely contained, and then a sheet is down on the floor to shield them from the filth. This way, I don't have to worry about germs.
I sure some of you may find me strange. But that is okay.