Air Conditioning - Air Condition Leak after stopping

After my A/C runs it begins to leak sometimes quite heavily. Initially I thought it was because it was running to long at a very low temperature (being in sunny south Florida) but it has begun to leak even after running at moderate temperatures. Do I need to bring someone out or is there something I can do myself to fix the problem. It only leaks after running for long periods of time still. It seems to be fine if it runs in short spurts but that is difficult to control through the evening?

Thanks..

Check and clean the drain line .Use a shop vac to suck or blow on the line . Check that the P trap is clean. Is filter clean ???coil clean????
out side at the condenser is the big copper pipe cold and wet ??? The small pipe warm. Post back same post here some one can help.

ED;)