Common mistakes in car detailing include using improper cleaning agents such as household dish soap or laundry powder. Neutral specialized cleaning agents with a pH value of 6.5-7.5 should be used instead. When washing the car, if the pre-wash step is ignored or the car is rinsed immediately after being exposed to direct sunlight, sand and gravel can easily scratch the paint surface, and high temperatures will accelerate the chemical reaction of the cleaning agent. The correct process is to perform dry cleaning - wet cleaning - dry wiping on cloudy days or during morning and evening hours, and use chamois leather to dry the car. Applying wax too thickly (more than 0.2mm) will reduce glossiness. It is best to use car wax containing silicone oil every three months, while avoiding corrosion caused by not cleaning acidic rainwater in time after rain. In addition, blindly using imported tyres may cause bulges due to insufficient sidewall impact resistance, and excessive engine oil will increase engine power loss and even cause oil burning, so the oil level should be kept between the marks on the dipstick. Interior cleaning requires specialized leather or fabric care agents, and the air conditioning filter should be replaced every six months to reduce PM2.5 concentration by 70%. The choice between coating and glazing depends on the budget; the former has higher hardness but is more expensive, while minor scratches (within 0.1mm) can be repaired with toothpaste. For example, timely maintenance can save 0.8 litres of fuel per 100 kilometres.
