I use a pro-knot¹ as a starting-knot. Weave 4 crosses, pull first 2 crosses in one pull (old rule: never pull directly on a knot).
The nose of the knot would prevent it to be pulled into the grommet (never happens).
In fact, the knot always needs to be tightened; I tighten after finishing all crosses, using pliers in a lever-way.
Advantages:
- no string waste
- compact knot
- all 4 knots same
¹: in fact a simple overhand knot around the ankerstring; I "catch" the ankerstring in the knot. After pulling tension it ends as a proknot