What should I do if the distribution rate of the hose sprinkler becomes uneven or significantly less?

Experience has shown that individual slots may be blocked by deposits or dirt. Cleaning is, of course, difficult. Where there is limescale build-up, it can be helpful to place the sprinkler hose in vinegar/household descaler. The soaker can then be kneaded and rolled vigorously to release the blockages. Then flush the soaker hose with high water pressure without a water stop.