Test Strips and Lancets: Storage, Use, and When to Replace Them

Glucose meters get all the attention, but day-to-day accuracy lives and dies with your consumables. Mishandled strips and reused lancets are two of the most common — and most fixable — problems in home monitoring.

Test strips: small, sensitive, and worth protecting

Each test strip carries enzymes that react with glucose in your blood. Those enzymes degrade with heat, humidity, and air exposure. To keep them reliable:

• Keep strips in their original vial, capped tightly — the vial contains a desiccant that protects them. Never carry loose strips in a pocket.
• Store at room temperature, away from bathrooms, cars, and windowsills.
• Check the expiry date — and note that some strips also have a shorter “discard after opening” window.
• Use strips matched to your meter. PPD-401T strips pair with the PPD-400G monitor; strips aren't interchangeable across brands.

Lancets: yes, single-use really matters

It's tempting to reuse lancets — but they're sterile only once. After one use, the tip dulls and micro-bends, which makes the next prick more painful and increases infection risk. Fresh lancet each test, prick the side of the fingertip, rotate fingers, and dispose in a sharps container (your pharmacy can supply one and accept full containers in most provinces).

When results seem off

1. Wash and dry your hands — fruit residue is the classic false high.
2. Re-test with a fresh strip from a properly stored vial.
3. If your meter supports control solution, run a control test.
4. Persistently odd results? Bring meter and strips to your pharmacy or care team.

A simple reorder rhythm

Count your weekly tests and keep at least a month of strips and lancets ahead. Many of our customers reorder the Diabetes Care Bundle components together so nothing runs out mid-week.

This article is for general education only and is not medical advice. Follow the testing plan from your diabetes care team.