How much detergent to use

Detergent caps are sized and marked generously — the manufacturer sells detergent, and the lines are calibrated to worst-case loads. The American Cleaning Institute's core advice is simply to use the PROPER amount for the load: too much and too little both clean worse than the right dose. In practice, for a modern machine and a normal load, that proper amount is near the bottom marking.

Pods remove the measuring and the flexibility: one pod for normal loads, two only for large heavily soiled ones — and for small loads, pods simply overdose, which is a real argument for keeping liquid around for small and delicate loads.

• Stiff, scratchy, or dingy towels — residue coats fibers. See washing towels.
• Clothes smell musty despite washing — residue traps oils and feeds odor.
• Suds visible late in the rinse, or a slimy drum gasket and detergent drawer.
• Dark clothes come out with pale streaks that brush off dry.
• Skin irritation from residue in fabric — common with overdosed baby loads; see washing baby clothes.

The fix costs nothing: drop to the lowest cap line for two weeks and watch every symptom fade. Chronic buildup strips out with one or two hot detergent-free washes for tolerant items like towels.

Grimy collars and cuffs that survive washing, gray whites, and odor returning as soon as clothes warm up all point to too little detergent for the soil — common when someone read advice like this page and swung to a teaspoon per load. Step up a line for the dirty loads specifically; dosage isn't a moral position, it's per-load arithmetic.

• Fabric softener: skip it entirely for towels, activewear, microfiber, baby items, and sleepwear — most of this site's categories. Where it's harmless (cotton casuals), it's optional, dosed minimally.
• Oxygen boosters: useful for whites and stains, dosed per their package, added to the drum not the drawer (usually — read it).
• Chlorine bleach: solid white cotton only, label permitting, never with wool, silk, spandex, or anything colored.