Throw it out??:(

My sourdough starter is 2+ weeks old.  Everything has been going beautifully and I've cooked with it daily for about 12 days now .  It is stored on the counter with a tea towel over it.  No problems!! 

Today, my dh put out foggers to kill fleas that have come in the house on our clothing.  The starter still smells and looks the same, but my concern is that the starter may now have been tainted.  Any input is appreciated!