^^^ Ditto times two: SINUS issues 4Ever. 
While I highly doubt wearing any aid would contribute to getting colds here’s what helps: place your aids in a UV sanitizer EVERY SINGLE night! You can buy these units up at Amazon. They’ll eliminate 99% of the viruses and bacteria on the aids.
ALWAYS wash your hands before touching your aids! First thing in the morning and last thing at night: wash hands before handling aids.
Best of all: I absolutely SWEAR by PressureEze110 for reducing sinus issues overall. No kidding, I was just introduced to this saline nasal spray a week ago, got some at Amazon, and use it about every other day. Keeps my nasal passages WIDE open and even helps a lot to clear my ears.
The main transmission mechanisms for colds is HANDS and the air you breathe. Try to identify the viruses coming to you via those two pathways and eliminate them.
Yes. Even live in a cave! (OK, just kidding.) 