Fabric Softener.
You're using too much fabric softener. Personally, I use the liquid and not much of it. The new super-concentrated stuff is like slime and I use VERY little (maybe 1 ounce), and then dilute that with hot water. Excessive fabric softener can also attract dirt so your things get dirty sooner.
In light of the fabric softener usage, I would recommend cleaning the sensor strips. Once the sensor is working properly, I would experiment with setting the timer for different levels of dryness. Don't let the clothes over-dry because they will get scratchy and stiff (the very thing fabric softener is supposed to combat). You may find you need significantly less fabric softener to achieve the levels of fabric comfort you desire once you can find a better dryness setting.
Dave