Coffee not coming out

Just got some new coffee beans and ground it up and prepared the machine a Delonghi EC330. The coffee dripped out very very slowly. So cleaned the holes in the spout, cleaned the espresso boiler outlet and pressed the tank lightly to open the valve at the bottom. None of these worked. About to try putting in a bit of vinegar in with the water to see if that clears it out. Any more suggestions? Only had the machine since Xmas but it is used everyday.