Why does my baby fall lower on my body while in the Ring Sling over time?

Your baby should be close enough to kiss. It sounds like you're not getting it tight enough. Make sure the shoulder of the sling is also cupping your shoulder and that the sling is spread widely across your back. To tighten more easily, try tightening from under your arm and across baby's back by bringing the slack in the sling to the rings before pulling it through, and always maintain a secure M-position for baby, who will be seated in the hammock of the carrier. I would recommend starting with your sling pre-adjusted so you don't have make as many changes once baby is in the sling!