Handling Coins With Bare Hands

It makes sense to me. When you slip on the cotton gloves you lose a great deal of tactile sensation and grip.

Yes, the TPG graders use bare fingers to handle coins, but only by the edges. They know what they're doing. You can bet they wash their hands many times a day although the grading rooms are climate controlled to minimize sweat. Also, the surfaces under the coins are padded in the instance of a dropped coin.

Again, they know what they are doing. Most of us collectors should wear gloves and not attempt to emulate professional graders. A misplaced fingerprint can deface and devalue a coin. While valid arguments can be made about which type gloves to wear, light cotton or latex/surgical/plastic, my own druthers are for the latter since they afford more sensitive feel than cotton.

In the unlikely event that four professional graders at one of the top four TPGs can't agree on the grade of a coin (i.e., three different grades for the same coin at a top TPG is highly unlikely unless it was a unique [very rare] coin not seen before and for which they have no benchmark coins), I suspect they'd sit down and have a meeting to discuss it to reach a consensus. I also suspect given these days of conservative grading that the lower grade would be selected.