I bought the Apera pH meter to test my oil in water lotion and I now realise that I wouldn’t know how to clean is as there will be oily residue left on the meter. Can any one advise?
Also, I’m wondering if I can dip the meter straight into the lotion to test or would I have to do a dilution? If a dilution, doesn’t anyone have a formula for working out the actual ph of the lotion?
Thanks in advance.