What do you mean by "it shuts itself down" ?
Are you saying that the motor shuts completely off like it has an overload protection on it?
How did you spray it down.....water? If so, unplug it, shake the motor around to see if it has any water in it, then either get a can of contact cleaner and spray it around in there or you can even use some WD-40.
DO NOT and I repeat DO NOT turn it on while the WD-40 is wet. After doing that, take an air hose if you have one and blow it out well. Set it out in the sun for a little while so things dry up. After you are sure the WD or contact cleaner is dried, plug it in and try it.
WD-40 works great on an electrical motor that has gotten wet, but when that motor sparks inside it will ignite the WD although it really is way more scarier that it actually is. My dad taught me well just from watching the things he did.
