Sensor Cleaning & Fuzzy Pictures

[Rmclain3]

I recently cleaned the sensor in my Rebel XT. I tested the job by taking a pic of the sky at F22 and found that I did a good job (ie. no more dust particles on the sensor). I have noticed though that some of my telephoto pics seem to have a fuzzy contrast type glare now (like between the red and white stripes on my son's uniform). I don't notice this at all when I use my 50mm prime or my kit zoom. Only with the 70-300mm consumer Canon zoom.

My question is this: Could my Copperhill cleaning fluid have left a haze-like film residue on the sensor or is it the lens? I'm planing on getting a better zoom but I'm extra concerned that there may be something on the sensor.

Any suggestions?

[Daniel Bates]

If you cleaned the sensor, and you're seeing strange optical effects with one of your lenses but not the other ones, I would venture to guess that the fault lies with the 70-300.

[Jay Henley]

If you followed the CH directions, I doubt if you hurt the sensor any. I agree with Daniel that is probably just your lens that is the problem.