May not benefit to buy many strips, consider how you test
They react quickly and are working well for me. I did notice that the box said best if used within 60 days of opening and I was hoping to make them last longer. I am not storing them in the bathroom, to keep them out of heat and humidity. I am guessing this is just a date to ensure freshness but they last much longer like dates on many other products.
Rating: 5 stars