The use of the line sinking spray is recommended, when the accumulated stains on the line make it harder to sink, but it can come in handy in other situations as well. Spray the line on the spool with the: it will decrease the surface tension the line experiences. This makes it easier to submerge your line under the water, and eliminate the interfering effect of surface currents. You can notice, that the use of the , decreases the friction between the line and the rings. This can be felt during casting, and allows for measurably longer casts. The line accumulates much less stain if it is treated once or twice per fishing. Due to its components it does not damage the structure of the line.