I looked up "Warfarin" and found it's a blood medication, Scarry they are prescribing rat poison to humans for blood clot problems
I had heard the dryer sheet thing before but to tell the truth it's just an internet myth. Our friends had a really bad mouse problem in their motorhome so they tried the dryer sheet idea, low and behold they ended up with fluffy, fresh cotton smelling mice! Yeah, the mice had taken the dryer sheets for their nests. He found them all ripped up under the cabinets. Don't count on dryer sheets to keep mice away. I think the Warfarin is a better plan (or Decon and traps).
We would let our dachshunds loose on them if I thought they wouldn't absolutely tear the RV apart trying to get to the mice.