Why does the oil in my fryer go dark so quickly?

Oil that darkens quickly is often overloaded with crumbs, used too long, or heated with too much moisture from food. The supplied manuals say oil should be changed regularly, especially when it turns dark or the smell changes, and that food should be dry before frying.

1. Check whether you are frying wet, battered or frozen food in large quantities. Expected result: smaller, drier batches should keep the oil clearer for longer. If heavy moisture keeps darkening the oil quickly, stop using the fryer.
2. Look for excess crumbs in the bowl after cooling. Expected result: cleaning the basket and removing residues should slow discolouration. If the oil still darkens rapidly, replace it before using the fryer again.
3. Compare the smell and colour of the oil with fresh oil. Expected result: oil that is dark or smells stale should be changed. If you are unsure whether the oil is safe, stop using the fryer until the oil is replaced.
4. Confirm that the fryer bowl and accessories are thoroughly dry after cleaning. Expected result: dry parts should help the oil stay cleaner. If the problem continues despite normal care, contact the retailer or store where it was purchased.

Do not keep frying in oil that smells burnt, smokes easily or bubbles unusually. When in doubt, stop using the fryer and replace the oil only when the appliance is fully cool.