bonesxxx Login to your owner app on your smart phone.
Click on the "calendar" button at the bottom.
Go to the dates you have blocked, use your finger to select the date or date range that is blocked.
This will place a blue line around those dates.
At the bottom of the screen you will see a blue bar indicating the selected dates.
Tap on the blue bar with your finger.
This will bring up a new screen that shows the dates with "blocked" written under them.
Tap the dates with your finger.
A new screen comes up, you can then tap the "Cancel Reservation" button at the bottom to unblock those dates.
I use the phone app more than I use my laptop. I have blocked and unblocked dates quiet a lot, and it has never affected my cancellation metrics.