You can cancel your automatic refills in your online portal.
Please go here (https://nimasensor.com/account/login) and login. Once logged in go to "Manage subscriptions."
Click "Cancel subscription."
A pop-up will appear, confirm you want to cancel the automatic refills but clicking "delete."
Once deleted, the automatic refills will no longer appear under "Manage subscriptions."
If you experience any issues, please use Goggle Chrome and use an incognito/private window. You can open an incognito window by clicking "file" in the upper left hand corner.