Airlock Question

[GioGomez2010]

Hey guys,
I just had a question about my airlock real quick. I went to check how the brew was doing after leaving it to ferment last night, and I realized that the little cap that goes inside is missing. I must've forgot to put it in last night and now I can't find the damn thing! Haha Is there any problem with not having that piece in there?

 

[beerkrump]

Not really. Just to be safe, you can cover the airlock loosely with a piece of foil. That should keep any stray dust from floating in and allow CO2 to escape.