A/C only blowing cool air but not cold

I have changed the cabin air filter as it appeared to be clogged. The A/C compressor and the cooling fan seem to be working properly. Just from looking at the A/C condenser from outside of the grille it seems to have some dirt but not much for me to considered it clogged, do I have to remove the grille and inspect it more further? If not what else can I do to try and resolve this issue?