WillC said:There are several possibilities. One is that the moisture meter may be misleading you because they are often inaccurate in certain potting mixes. Another possibility is that you are expecting the soil to dry too deep into the pot. A third possibility is that your Pothos was repotted into a larger pot with added soil that is retaining moisture for too long.
Please post a photo of your plant and its pot.
WillC said:Thanks for the photos. The pot size is fine. The soil is a bit dense, so it may take longer than usual to dry out.
Use your finger to determine when the top half-inch of soil feels dry before watering it, regardless of what the meter reads. Soil deeper than that should remain damp.
There is no evidence of a fungus so the cinnamon is unnecessary.
WillC said:Many folks are overly concerned about overwatering. The top half-inch of soil should dry before you water. If you let the soil dry much deeper than that, you are dehydrating the roots. The soil in the lower portion of the pot should always remain damp or wet. Just monitor the upper half-inch or so of soil and ignore the rest.