In the double vertical decrease (S2kp), two stitches are decreased by slipping 2 stitches knitwise. Then, the next stitch is knit. Finally, the 2 slipped stitches are passed over the knitted stitch. This double vertical decrease is used for shaping in knitting. I used this technique in the Hydrangea Dishcloth and in the With a Twist Dishcloth. I like this method for the mitered square shaped dishcloths. The double decrease creates a straight vertical knit stitch when used in the center of the work. The video and written instructions below show how to do a double vertical decrease (s2kp) for right-hand knitting.

The Double Vertical Decrease (S2kp):

Steps to make a Double Vertical Decrease (S2kp):

1. Insert the right knitting needle into the front of second and then the first stitch as if to knit 2 together
2. Slip the 2 stitches off the left knitting needle and onto the right knitting needle
3. The 2 slipped stitches are now on the right knitting needle
4. Knit the next stitch from the left knitting needle onto the right knitting needle
5. Insert the the left knitting needle into the front loop on the 2 slipped stitches
6. Catch and hold the 2 slipped stitches onto the left knitting needle
7. Pass the 2 held slipped stitches on the left knitting needle over the knitted stitch on the right knitting needle
8. The double vertical decrease (slip 2 stitches, knit 2, pass the slipped stitch over the knitted stitch) is now on the right knitting needle
9. Tug the working yarn to tighten the double vertical decrease stitch

Repeat Steps 1 through 9 for the double vertical decrease (s2kp)