I thought that it was time to check in! Believe it or not, I still have my last Invisalign retainers. I have completely stopped wearing the bottom retainer at night. I think that I may have stopped wearing it at night too much and my bottom teeth shifted a little bit. Now it's just too uncomfortable to put in. The good news is that despite the discomfort of the tray, the teeth still appear to be very strait. I can still fit the top tray in and I do wear it to bed about twice a month. It's mostly a mental thing to make me feel like everything is still in place.