Hi experts. It turns out that my windshield wiper motor didn't work well. I took it out and it was covered like a grease or oil. I cleaned it with a rag and it started working a little. The issue is that it is extremely dirty yet, and I don't know how to clean it. Go picture: Consultation: how is this type of electric motors cleaned? With oil? soap? wet rag? Could you help me? Thank you very much in advance.

Look, I don't know what the commercial product is called in your country, to avoid problems let me tell you that here in Mexico they sell a spray that is used to clean the electrical circuits of the PCs and clean all types of electrical circuit circuit without problem, I have used for the same thing you need, which is to clean an automotive windshield wiper motor without opening it and does not damage the winding varnish. As it is likely that the trade name is another better look for it as " Isopropyl Alcohol " very well clean the internal dirt especially if it is fat and volatilizes very quickly and with which you do it inside a bucket or bucket There you collect everything I had inside the dirt. Maybe the intermittent operation is due to the fact that the brushes have wear or it is probably a bad contact due to the dirt, because you do not try to clean it with this product first and then see if it improves, I hope the suggestion will help me I have resolved the malfunction of 3 of those not very new car engines and it worked very well for me