How to Clean the PH Meter
If your ph meter has been left to dry out and is now covered in dust and the crystallised remnants of whatever it was submerged in – you may want to consider getting it professionally serviced. It may still be ok, but could need a special treatment to get it working properly. Otherwise, if it’s in pretty good condition, there are things that can be done to keep it running smoothly. Special washes can be bought to treat the probes and can be used regularly (perhaps once a month or so, depending on how often the pH meter is used) to maintain the special conductive surface of the probe. Junctions in the meter may become clogged sometimes too – follow the manufacturer’s instructions for cleaning in these instances.
It’s also important to clean the electrode between uses – don’t just take it out of your solution you’ve been working with and put it back in the storage solution. Rinse the probe with distilled or deionized water (which is ok for washing and rinsing – just not for submersion!) and then dry it quickly by blotting (NOT wiping!) before submerging it in your next solution or returning it to the storage solution.