I GLEAMed my track years ago so there’s no need for a serious cleaning. The only thing I have to guard against is the black stuff that results from the corrosion of nickel-silver. For that I use a single Bachmann track cleaning tank car. It’s more or less the same thing as what’s in Eaglescouts link. Just a dry pad that’s dragged on the railheads. It does an excellent job and I see no reason to get anything more aggressive or expensive. I’ve been using the car for over a year and only recently replaced the original cleaning pad. Replacement pads cost less than $20 for two.