Many trout refusals of dry flies result from one of two problems which can be easily corrected. First the fly may be too large for his liking. Here we simply switch to a smaller fly. A dragging dry fly is another cause for refusals. Here a slack line cast, or a different presentation position, or a different presentation angle or dropping your dry fly closer to the trout’s feeding station will enable the dry fly to drift naturally and the trout will take it solidly.