Have you wondered if you can or should clean your tCheck device?
The tCheck tray is designed to minimize oil spillage into the tCheck device. However, in the event that some oil escapes the tray and leaks into the tray slot, we recommend you use a Q-Tip to gently wipe the spilled oil. After the oils have been removed, you may optionally further clean by using 91%+ isopropyl alcohol on a Q-Tip to clean off the last remnants. Be sure to remove the batteries from your device prior to cleaning.
Do not use any petroleum-based cleaners. Do not pour alcohol directly into the slot. Do not attempt to disassemble the device as this will invalidate the calibration and void the warranty.
To minimize any spillage we recommend you keep your tCheck device on a flat surface when testing to avoid any tray material leaking into the device.