There's nothing more frustrating than pulling a shirt out of the wash and spotting a stain that refuses to budge. Hours of effort feel wasted, and scrubbing often leaves behind a faint spot that never ...

Spots on fruits and vegetables can raise questions: are they a sign of spoilage or a harmless surface defect? Before you toss a zucchini with a brown spot or an apple with a dark blotch into the bin, ...