How do I clean the coils on my Hampton Bay...

The problem is probably due to dirty or clogged coils. Cleaning the coils to a dehumidifier is similar to cleaning the coils on an air conditioner. It really depends on how dirty the coils are. If it is not too dirty you can use a shop vacuum with a brush attachment. If it is really dirty you will have to use a non acidic hvac coil cleaner or you can use a household cleaner like Simple Green that has been diluted 1:1 with water and placed in a spray bottle. Spray the solution on and let it sit for 5-10 minutes. Make sure you unplug the unit before doing anything. If you use Simple Green make sure you spray it down with clean water. If you use an hvac type coil cleaner some do not require rinsing. Follow the directions on the product exactly. You might have to use a brush or even a putty knife if the coil is totally clogged. Be careful you do not damage the coil. Good luck!