I added fuel to this figure to show where the correct fuel level needs to be.
The fuel level needs to be near the bottom of the pilot air hole, but the figure clearly shows why if it is any higher it will leak out that hole. If yours doesn't ordinarily leak, but continues to after you tickle it, it could be more that the float needle is hanging up in the holes it rides in at the top and bottom rather than not sealing at the seat.
Another common source of continuous seepage is the joint where the big "nut" attaches to the main body. If the sealing washer in there doesn't completely seal, which is often the case, fuel works its way up the threads and out onto your foot.
The fuel level needs to be near the bottom of the pilot air hole, but the figure clearly shows why if it is any higher it will leak out that hole. If yours doesn't ordinarily leak, but continues to after you tickle it, it could be more that the float needle is hanging up in the holes it rides in at the top and bottom rather than not sealing at the seat.
Another common source of continuous seepage is the joint where the big "nut" attaches to the main body. If the sealing washer in there doesn't completely seal, which is often the case, fuel works its way up the threads and out onto your foot.