I bought a 2015 Scion xB. Her name is Lay Lay the Brave Toaster. I bought her with 37k back at the end of March 2020. I have done two fuel induction cleanings, tranny flush per the manufacture preventive maintenance for 60k miles, break pads, tires, alignment, and oil changes every 3,000 miles. Should I do plugs and wires now? I was told not till 100k but she is running a bit rough!!! I would like some thought please.