Had 2 specs of dust on my sensor that only ever showed up when against a light sky. No real problem, just niggled me. So, £12 on a Giotto Rocket blower, a good clean and dust of the camera, surrounding work area, pumped the Rocket blower 20 times to ensure no dust is caught inside, then 4 good blows on the sensor.
Take a test pic of the sky at f8 and it looks like I've used the body as an ash tray. AAAAAAGGGGHHHHHHHH! I'd say damn near unusable unless I want to spent 20 mins on each photo clearing up splodges.
So now going to have to buy some eclipse solution and swabs to sort this bloody mess out. Can't wait for the drama that unfolds then! Look out for my next post "Buggered up my sensor - What new camera to buy"