To avoid a hole when switching stitches, it's sometimes helpful to work the stitch after the switch through the back loop. It twists it and makes it a bit tighter.
On the next row, you work that twisted stitch through the back loop to untwist it.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry