Coffee grounds for odor absorption.

Dry, used coffee grounds are known for their odor-absorbing properties. When sprinkled over carpet, they can neutralize and absorb unpleasant smells. This method is particularly effective for musty or pet odors. However, it's essential to ensure the coffee grounds are completely dry to prevent staining, especially on light-colored carpets, and to test in an inconspicuous area first. This method will impart a coffee aroma, which may be desirable or undesirable depending on personal preference.