If God is literally everywhere like you appear to assume, that should mean God is literally in blades of grass, is literally in carpet fibers, is literally in coffee grounds, is literally in sewage, so on and so on. Because if He is not literally in all of these places, then He's not literally omnipresent in the sense you are taking it to mean. There's other ways for God to be omnipresent without Him literally having to be everywhere physically. He can be everywhere via His creation, via His angels, etc. It might be like cameras and satellites today. The government can be in more than one place at the same time via things like these, yet this doesn't mean they are literally physically present in all of these places.