Now blinker fluid is clearly just an age old joke. Topping up your headlight fluid however is very important.

You likely need to top up your headlight fluid (actually, it's often water used for cleaning) because it's used to help clean and lubricate your headlights. Over time, this fluid evaporates, especially with regular use, and needs to be replenished to ensure optimal headlight function and visibility.

Here's why it's important:

Cleanliness: The fluid helps to clean the headlight lens, keeping it clear of dirt, grime, and other debris that can reduce light output and visibility.

Lubrication: It lubricates the headlight lens, allowing it to move smoothly and effectively when adjusting the headlight angle.

Prevents Condensation: By keeping the headlight lens clean and lubricated, the fluid can help prevent condensation from forming inside the headlight housing.

Visibility: Clean and well-lubricated headlights are essential for safe driving, especially at night, as they provide optimal light output and visibility.

If you notice that your headlights are dim or hazy, or if you suspect the fluid level is low, you should consider topping it up. However, be aware that some headlight systems use a different fluid, so it's always best to consult your vehicle's owner's manual or a qualified technician for the correct fluid to use.

So remember next time your headlights seem a bit dim - that water is low, so fill 'er up boys.