Ming Rui, how often does the throttle have to be cleaned?

Buy your own 5053 line, which is convenient and affordable. I can't say exactly how often I wash it. In general, the throttle opening should not be greater than 4. I washed it myself 15000km, and the throttle opening was 5.5% (urban road conditions). A bottle of electronic accelerator cleaner sold by a certain treasure is only about 30 yuan, and I can't even use half of it at a time.