Second, here is the email we (and others) received from the Alderman's office (slightly paraphrased):
Thank you for reporting this condition to us.
The CTA tells us that this station, like all others, is cleaned every seven to ten days. While the CTA can not afford to install preventative measures to keep the pigeons from roosting there (due to service cuts and other budget woes), we have asked for a quote to see if it can be paid for some other way.
If you have additional questions or concerns, you may reach out to our office or to the CTA.
So not exactly the resolution we were hoping for from the CTA, but it sounds like the Alderman's office is still open to potentially paying for this some other way (obviously depending on how much the quote is).
With that said, we had one reader offer to chip in $20 to help the situation. Just out of curiosity anyone else up for throwing in some money if needed?
(Hat Tip PMF!)