My dehumidifier has a function that if you lower the humidity setting to the lowest point (35%), and hit the "negative" button again, it will lock it to run continuously. Instead of showing the humidity setting, it shows "on". I did not set the unit this way, but it appears that it is working that way. How do a regain control of this unit so that I can set the desired humidity level. If I hit the "positive" button (to raise the humidity setting), nothing happens not even a beep. If I hit the "negative" button, nothing happens, but the unit does beep. I am now using the unit on two hour cycle which I can set from the panel and it works fine like that. The humidity level indicator show that the humidity is being lowered and I have seen it go as low as 65% in 2 hours before shutting off, but I'd like to be able to set the level at 70%.