
Kitchenaid Professional 5
This is my mixer, it's pretty old but still going strong. However, here lately, it's been making some weird sounds when it's running at medium speed. Sort of like a grinding noise. It only happens in short intervals. I try to take care of it the best I know, I keep it impeccably clean, but is there any preventative maintenance that I should be doing on it? I noticed some plastic inserts on the side that are cut for a standard screwdriver. Is there any lubing I should be doing on it? Thanks in advance.