I have two pumps and a backup. This is the wet season, my basement started getting water. I checked the pumps to find that the holes in the liner were clogged. I stuck a screwdriver in the holes and several of them opened up and water has been pouring in the pumps for several days now. I have had to open the holes again several times. How can I correct this problem and get more holes open? It seems like it is all clogged behind the liner.