Related Clues:
- Theme of this puzzle
- Astronomer's sighting
- Hale-Bopp, e.g.
- Cleaner/disinfectant brand
- Popular disinfectant
- Kitchen cleanser
- Doomsday cause, maybe
- Common cleanser
- Mr. Clean alternative
- Eliminator of 41-Down
- Disinfectant brand
- Streaker in the night sky
- Celestial object
- Best-selling disinfectant brand
- Big name in household cleaning