I use tubular track, but I don't really think it is the most trouble free or needs the least cleaning. The connector pins can be subject to corrosion, depending on the humidity where you live. If the inside of the track gets rusty, it's hard to clean, especially curves. When you are laying the track, it is absolutely imperative to check the fit of every single pin and tighten any loose connections with a track pliers. The plating on tubular track undergoes some sort of transformation with the electrical sparks generated by the wheels and rollers, especially on equipment with open-frame motors. (I think this may be a form of "galvanic corrosion," but that may not be the correct term.) The result is a kind of black gunk that is not just common dirt and oil, but something heavier.
I have some experience with club layouts using Gargraves and Ross track, and it seems to me that those have fewer problems and require less cleaning than tubular. I built my layout with tubular anyway for several reasons:
-- It's a dual-gauge layout, 0 and Standard Gauge, and I wanted a classic look for the Standard Gauge. Using tubular for the 0 gauge kept the look consistent.
-- I have a lot of ETS tinplate, which uses sliders instead of rollers. Square-profile track is very hard on sliders, and ETS parts are expensive and hard to get. The sliders last a lot longer on tubular track.
-- I had a big pile of tubular track to start with, which made the cost picture very favorable toward tubular.
-- My layout does not get heavy use, and all the track is easily accessible for cleaning.
One thing that helps a lot with tubular track is using long straight sections rather than traditional 10" straight sections. The longer sections eliminate a lot of track joints.