Throwin corkys

Found some fish the past couple weeks close to my house nothing crazy throwing soft plastics and even free lined shrimp one day. Anyways when I know fish are there I like to switch over to the corky fat boy and see what I can do. Well apparently I can't do much bc I've only caught one fish this winter using one. Been throwing the fat boy over chest deep mud and shell trying to let it touch the bottom and then pop it back to the top reeling in the slack slowly. I want to target bigger trout and it's frustrating bc I feel ive put in work with corkys with minimal success. Any input would be appreciated