I've never really cleaned anything under neath the aerator except the tines....get the dirt out of them so the moisture won't rust the tines from dirt/plugs sitting in them.
It doesn't get really too dirty from pulling plugs. And I don't grease up the chains, since the grease will attract more dirt. There is a light film of grease from the factory on the chains....other wise I grease the grease zerts and keep up with general maintenance.
It's a great machine and once you get used to it....makes core aeration super easy!
Every time I aerate a yard.....everyone is really impressed with the job the machine does.
2013 Ford F450 Super Duty Truck
2010 Exmark Lazer Z 60" deck
2012 ExMark 30" Riding Aerator
2011 John Deere Pro Gator 2020a
2011 Lawn Solution Dual Hyrdo Aerator 24"
2011 Echo Handheld (trimmers to power pruners)
2007 Big Tex 4ft metal high side 7' x 12' Trailer
2012 PJ 7' x 16' Dump Trailer
2014 Vintage 8.5' x 24' Enclosed Trailer
2012 Ecolawn Applicator model 200 Compost Spreader