They were the bugs the spray couldn't kill. And the creepy bedbugs just kept multiplying at the Coatesville Towers.
Finally the owners had to evacuate all 100 residents while a contractor now tries to cook the bedbugs with high-powered heaters.
75 tenants are staying with friends or family, but 25 residents have been relocated to another property in Norristown.
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The building owners hope to kill off the bedbugs and get the residents home by Wednesday night.
The Coatesville Towers provides affordable housing to residents 62 and older.