On Friday, March 1, 2019 at 3:45:05 AM UTC-5, Eric Munk wrote:
At 02:42 28 February 2019, George Haeh wrote:
The club Grob had copious evidence of rodent infestation

Might be an idea to check the aircraft out for damage, if not already done
so. Had a Twin Astir one day that had all the foam supports for the rudder
control rods gnawed away, leaving only the nylon guides dangling from the
rod. Nasty repair, too.

I've always used moth balls, never had a problem. Usually put them in place middle/end of November and remove in end of march/early april. When removed, they still have a strong smell. I usually place a packet of them on the seat, near the rudder pedals, where the wing spars go in the fuselage, in the front of the trailer/wing root area and under the rudder; this seems to cover the obvious entry points and I've never had an issues with rodents to date. The odor goes away within a few days of removing them and it's never been so strong that it's bothersome for the first flight of the year, assuming you can keep a vent open. I've never tried the scented dryer sheets, but may do so next year?