Disappointed with Chekcers

[denny_C]

Originally Posted by Twinn

I am not disappointed with my checkers as I did read/watch some youtube reviews before ordering mine and all the reviews stated it only came with 6 test packets.

My real concern is over the long term use and how to clean the little glass vials so they don't give false readings in the future. Will PO4 build up over time in the glass vial and mess up future readings?

fill the vials with ro/di water after use until you need them next