The decline and fall of the rolling empire

Yesterday was the last pool session of the year for the canoe club and I got to spend my usual 10-15 mins in a boat paddling around. My general paddling skills are now reasonable, but for the last couple of months my ability to roll has declined considerably. At the start of the new term I could upright myself the vast majority of times when I capsized (generally on purpose), but yesterday I managed a meager one roll for three attempts, which has been the norm for the last few weeks. I think I started to get a bit complacent and have been relying on pulling down on the paddle as leverage too much rather than using a nice strong hip-flick. This will need to be remedied come the new year