GHL PH probe cleaning

[george7523]

I noticed the glass orb tip of the GHL ph probe has a thin layer of calcium precipitate build up. Can I dip the probe in BRS citric acid ? Is it safe to brush the tip with soft brush ? I read elsewhere that the tip should never be touched. If this is the case, what is the best way to clean it ?

Thank you.

 

[tmccaff]

Soft brush and warm water or 50/50 mix of water and white vinegar.

 

[george7523]

Would brs citric acid be ok as well ?