Hi, I have purchased some Nuwell tablets for my sandpoint. We have slowly been getting less and less water pressure from it. Hoping this will maybe clean the point out.... We have sandy soil, so not sure what could be blocking it down there. But hoping to try this, before putting in a new point. My question is, once I put the tablets down, do I stir them around and cap the pipe back up? Or do I leave the cap off the pipe? Thanks you for any help!!