While toilet bowls are designed such that the contents are supposed to flush downward, scientists have known for decades that ...

Instead, completely remove the lid from the can and place it inside the can (after rinsing). Aerosol cans: Lids on aerosol cans are typically plastic, so you should remove those before putting the ...

When the toilet is flushed with the lid closed, the aerosol effect may be reduced if the toilet is at least 15 cm away from the lid. The researchers found that it seemed more hygienic to close the ...