This morning I noticed 2 of my sensors were showing 99.9% moisture, I knew this had to be wrong as it was a lot lower yesterday and it’s been hot and dry. I pulled them out, cleaned them off and tried to recalibrate them. When they are dry, the reading is zero, in a cup of water one is only showing 10.56% and the other 24.74%.
I’ve cleaned and tried to calibrate them quite a few times with no difference made. I’ve only had them since 18th April this year.