So I cleaned out my IGH wheel by hosing it with soapy water.
Before this happened, and when coasting, the IGH would always emit a clicking noise. I believe that this is typical of the freewheel.
After cleaning, I hear the clicking noise only intermittently. At very low speed coasting the IGH is almost silent and I only hear a light whirring. When coasting at higher speeds the clicking noise kind of kicks in properly.
The intermittent silences are a little worrying since it is not normal. I did not take apart the IGH when cleaning assuming that it was sealed and would not allow any water inside. But now I'm not sure. Could it be that some water has entered and has affected the mechanism? The hub works as normal so no worries there. But should I get it serviced just to be sure?