pH Probe Question

[Beverly]

The ball tip of my pH probe has a growth of coralline algae on it which I want to get rid of. Currently have the probe in a glass of tapwater for the last day, but none of the coralline has died yet. Am thinking of soaking it in vinegar, but am afraid the acidic nature of the vinegar will destroy the usefulness of the probe.

Any ideas of what I should do? Keep soaking in tapwater then scrub with a toothbrush, or soak in vinegar?