Egon - You could buy some thin indoor/outdoor carpet and cut strips to place under your tracks......would dampen the sound of the train running on it. And if you don't have one already, you'd save yourself a lot of work trying to clean your rails by hand by buying an LGB Track Cleaning Locomotive. I use one on my 400 feet of track on my garden railway. LGB/Marklin is producing two new models this year with delivery expected by June which I'll have available. Oh, another suggestion if you don't already do this: Change any plastic wheels on your rolling stock to metal wheels.........eliminates the plastic dusty created by plastic wheels. I use (and sell) the Bachmann metal wheels which come in a 4-pack for $20 compared to LGB metal wheels that come in a 2-pack for about the same price!