Dispersal agents work like detergents.
The idea is to keep the oil from forming a slick and coating everything including animals with black tarry crude.

This is a huge oil spill. It is being blown out of the well pipe very fast with extreme pressure.
There are not enough dispersant chemicals to prevent the oil from sticking or washing up on shore.

Organic agents like oil consuming bacteria are to slow and there is not a big enough supply of them either.

I have heard so much media trash talk about solutions that I think you might be better off without the media sources for a while.

The only real news is that it is bad, that it is still bad and that it is getting worse.