Firstly, avoid going over zippers and buttons, then when ironing synthetic fibre garments you should place a cloth between the iron and the fabric, to prevent it from sticking to the soleplate. If you make this mistake you will not just ruin the garment, but the iron. Therefore, it is advisable to use distilled water to avoid lime build-up and to completely empty the tank every time you use it.
If you have an old iron, maintenance can always be useful, but you cannot expect miracles, because an iron that has had its time cannot have much left to give . All that remains is to buy a new one.
Nowadays there are lots of models on the market, both traditional and modern, there are even vertical irons that allow you to remedy small wrinkles in a few minutes without having to take out the ironing board.
People who do very little ironing can settle for a classic iron, while those with a large family can buy an iron suitable for ironing large quantities of laundry, for example a professional one with a boiler. The latter requires more attention.