No, this is not about whether or not Farrah has an STD. I don't know whether this belongs in Physics or Engineering, so feel free to move it. In a normal day, I have a need to apply one drop of water at a time to something. A drip rate of anywhere from 1/2 second to about 3 seconds is acceptable. Faster results in too much saturation, and slower becomes tedious. I have a basic understanding of droplet formation regarding surface tension and gravity, but I've noticed a couple of discrepancies. The first is that the drip rate decreases over time. Even though it's the hot tap that I use, I assumed that the pressure from the heater would remain constant. If so, why would it slow down? Secondly, there's an regular irregularity to the pattern (with a couple of taps, not all). There'll be 3 or 4 normal single droplets, then 2 or 3 come out right on top of each other, then the pattern repeats. What would cause that?