I got to ask. If the grommet fell in, how is the air lock in? Just sitting in the hole?
As others have said, you don't need an airlock. Just cover the hole in the lid with a clean towel or wash cloth. When the SG gets down around 1.010 (some say under 1.020)and it is time to rack, you need to get it racked to glass and under an airlock as not as much carbon dioxide is being emitted to blanket the wine to prevent oxidation.