I bought a whet stone a few months ago and have tried to use it numerous times to sharpen knives, but it isn’t working well. It has a 1000 and 6000 grit side which seems mostly standard. I’ll get as close to 15 degrees as I can and spend a few minutes on each side sharpening. I feel for the burr which forms on the upward facing side as a guide. After the burr shows up, I flip sides. Then I move to the 6000 side to smooth it out. By this point it should be sharp, but it doesn’t seem much sharper than when I started as it doesn’t come close to cutting paper. Any suggestions?