How can you tell a co-worker he has bad breath without offending him?

Hey Everyone, so here’s the deal. It appears my co-worker has started taking those garlic vitamins or something like that, since it has been about two weeks that he’s had the worst breath! He comes to the room and the entire room smells like garlic until the doors are open. It is soo bad that I’ve felt the urge to mention it to him. The thing is I am really worried about hurting his feelings, but it is very bad. Any wise person that can help????

Acquire an ordinary brown bag, the kind you would use if you were bringing your lunch to work. Write his name on the outside of it. Inside the bag place a travel-sized toothbrush, a small tube of toothpaste, dental floss, chewing gum and breath mints. Enclose an unsigned note explaining that you don’t want to offend him but that he might find these items useful. Better yet, sign the note “The Tooth Fairy”. Place the bag in his cubicle while no one else is around so that the gift can be truly anonymous. I had to do this once and it worked very well. No one was embarrassed and the problem was solved.

please tell me if my grammar is correct.?

I need to know which one of the two to pick.

1. well
2. badly?
3. good
4. bad
5. good
6. badly?
7. good
8. bad
9. well?
10. bad