Using regular tap water in your car mirror cleaning bottle should generally be fine for most purposes. However, there are a few things to consider:
Water Quality: The quality of your tap water can vary depending on where you live. If your tap water is very hard or contains a lot of minerals, it could leave streaks or spots on your car mirrors as it evaporates. In such cases, using distilled or deionized water can be a better choice because it lacks the minerals and impurities found in tap water.
Freezing Temperatures: If you live in a region with freezing temperatures, be cautious about using just water in your cleaning bottle during cold weather. Water can freeze, which can cause damage to the bottle or its components. Adding a bit of windshield washer fluid or isopropyl alcohol to the water can help prevent freezing.
Cleaning Solution: If you want to ensure a streak-free and effective cleaning, you may want to consider using a dedicated automotive glass cleaner or a homemade cleaning solution that includes water, vinegar, and a small amount of dish soap. These solutions are formulated to clean glass surfaces effectively and minimize streaking.
In summary, you can use normal tap water in your car mirror cleaning bottle, but you should be mindful of the water quality, freezing temperatures, and consider using a dedicated glass cleaning solution for optimal results.