No biggie, but still

[Dygital]

So I get the "Washer fluid low" message, pull over at a gas station, and as I pop the cap of the washer fluid container, the cap's attachment breaks and the cap falls down to the bottom of the engine compartment. I tried reaching it to no avail. Can you guys help me answer these questions:

1. Is there any possibility for damage or burned plastic smell if I leave the cap there? It's directly underneath the left side of the engine.

2. My car is still under warranty. Any idea if stlr will replace the cap or washer fluid container free of charge?

3. Should I use something to cover the washer fluid container to prevent it from spilling meanwhile?

Thanks!