Likeliest in my opinion are the HVAC fresh air inlet path and various openings in the floor or footwell area. Final would be in or around the kick panels at either side. Mice can fit between gaps of 1/4" or less. Do not be surprised if you only find what appear to be openings that are too small. You can stuff steel wool into gaps to discourage entry. It must be well-packed or it can be easily dislodged. Eucalyptus and Pennyroyal oils seem to discourage. Not too sure on mothballs.
If you do use sticky traps, you can use vegetable oil to release anything as the glue is apparently soluble with oil. You can take the traps 'elsewhere' and drizzle oil onto the glue near the critter, and with any luck they will squirm free pretty quickly.
tom
If you do use sticky traps, you can use vegetable oil to release anything as the glue is apparently soluble with oil. You can take the traps 'elsewhere' and drizzle oil onto the glue near the critter, and with any luck they will squirm free pretty quickly.
tom
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