Mine hasn't been staking since 19th.

Left my computer on for all day too and nothing. It has been over 10 days and I haven't received a dime. Not even staking anymore it feels pointless. I'll try again after next wallet upgrade.
That stinks.
My staking has been working/staking just fine since day 1.
Everyday new BAY.
Hope you get it sorted out.
To the original poster, try creating a new address and sending all your coins to yourself. This will make a single, larger input of coins with a better chance at staking (since coinAge is no longer a variable).