Coolest invention: The steam mop.
I'm obsessed with my steam mop, and I cannot help it. I love a clean floor, but now I genuinely enjoy cleaning it. The steam mop makes mopping fun and simple. Best of all, it thoroughly cleans and sanitizes the floor without the use of chemicals. Now mopping takes me on a cleanliness mind trip to the nth degree. It's very therapeutic.
Worst invention: Cotton balls.
There is something not right about cotton balls. The worst is when I have a splitting headache, and I open a new bottle of aspirin only to find the medicine is buried beneath a mound of densely packed cotton. Tearing it apart is the worst!! Makes my jaw hurt just thinking about it, and I've got goose bumps now. I will not allow a cotton ball in my home.