Proper care of your window graphics is important to keeping them looking their best and extending their lifespan.
Specific care instructions will depend on the films used. The critical step is to ensure no abrasive cleaners are used on your graphics.
A standard neutral (ammonia free) window cleaner will most likely be all you need. As with any cleaning regime, the first step is to apply your cleaning mixture to a small area of graphics as a test. Once cleaned, the area should be rinsed with clean water. Regular maintenance to keep dust and dirt out of the edges of your graphics will make a significant difference to the expected lifespan of your graphics.
If your graphics include fine details, you need to be particularly careful. Use a soft cloth to avoid damaging or lifting the corners of your films.
You could also consider applying small warning stickers to your windows. These stickers provide an alert to cleaners about the existence of window films, with a warning not to use abrasive cleaners.