DJG.. I stumped too, unless you are really blocked by a new condo or other factor (have you talked to your neighbours about the issue?).
Since it is the only VHF channel off the CN Tower comparing to the UHF not reliable.
A quarter wave antenna at 180 MHz is 15 inches long but a wire you already tried. If you do not mind a few dollars, a VHF add on antenna to bowtie is available and you must have a UHF/VHF pre-amp
antenna link[Link: antennasdirect.saveandreplay.com]
Hope posting this have not broken any rules :-(