What Should I Do If I Think I Performed the Ketone Urine Test Incorrectly? 

If you think you performed the test incorrectly, you can: 

1. Check ‘Use By’ and ‘Opened’ dates for the strips. If ‘Use By’ date has passed or it is 3 months past ‘Opened’ date, discard strips. Repeat test with strips from a new vial. 
2. Check for discoloration of unused Test Pad. Discoloration may occur if canister cap was not completely closed, or if canister was stored in extreme heat or cold.  
3. Repeat test with strips from a new vial.