Plugs-Lubrication

Hey-Maybe one last rub then getting ready to winterize using Cabs instruction which were awesome last season. What do you all put on the block plugs vdrive plugs or any plugs to keep the threads lubricated over the winter.? I had a hard time getting them in in the spring. Thanks

I bought a small tube of lithium grease at the auto parts store and applied it to the drain hole threads using a q-tip.