I have a 'smartscreen' system fitted - it gives me a wash/wipe facility, and the ability to have an intermittent wipe (which I can set depending on how much rain - it logs the time between first and second wipes and then replicates it until I turn off.
The first one I had blew, due to increased amp draw from the motor. The cause was a grease clogged drive wheel in the motor, and a dirty tube/mechanism. I stripped them all down, cleaned them with brake cleaner, and then regreased with white lithium and all has worked fine since and the new smartscreen is working well.
