Check the product's recommended-surface notes or usage directions for explicit mentions of metal types. Look for phrases such as “Metal,” “Aluminum,” or “Silver” listed under recommended surfaces—these indicate the detergent is formulated or tested for those metals.

Look for clear ingredient or claims language such as “Bleach-Free,” “No chlorine bleach,” or “0% chlorine bleach” in the product’s ingredient, health claims, or marketing sections—these indicate the formula does not contain chlorine bleach.

Look for machine cleaners marketed as deep-cleaning or descaling formulas; product notes typically say they clean spray arms, filters, and internal pipes and target hard-water buildup and limescale. These cleaners are usually recommended for periodic use to maintain performance.

Check product claims for enzyme boosts or OXI/oxidizing stain-fighting action. Common phrases include “2X enzyme power,” “OXI stain-fighting action,” or mentions of added micro‑scrubbing enzymes—these signal enhanced formulas for breaking down baked‑on food and stains.

Look for explicit hard-water claims in the product description. Phrases to watch for include “works well even in hard water conditions” or “works in all water conditions,” which indicate the formula is designed to perform in hard water.