Left brake res. cap off overnight? Brake fluid compromised?

[B72011]

Working on the front and rear brakes I forgot to place the cap back on the reservoir overnight. I the brake fluid going to be severely compromised necessitating a flush. I have a brake flush pump and planned on doing it but need more time. Meanwhile I need to drive the car. Thoughts?
Should I just open up the res and turkey baster out the fluid and replace what's in the res? The car has yet to move so I'd imagine any compromised fluid would still be stuck in the res...unless it "wicks" it's way throughout th lines.
Thinking I'm over reacting here probably.

[swoardrider]

Turkey bast that res. and you will be fine

[The_Ocho]

I say you will be fine. I don't know how many times I've left caps off to gravity bleed brakes on some of my OffRoad rigs. I'm just as hard if not harder on those brakes then on the car

[Seerlah]

You should be just fine. Only issue you should be concerned about is the moisture that would have condensed in your fluid. If it wasn't raining, I doubt it to be much at all. Not enough to cause any issues.