Cleaning track on my layout is critical to keep trains running; in Florida due to humidity it oxidizes track and electrical conductivity is lost, I clean on an average every 6-8 weeks. I use two WDM2 Locos one pulling one pushing. The first cleaner is a Lux-Modelbau track grinder. Second is Lux-Modelbau Vacuum (both from Germany both have a DCC decoder in them)) third is CMX liquid tank filled with Rubbing Alcohol (weighs about 1 lb) . This is a heavy load for two locos especially on incline to upper deck. Locos have to strain at full power to climb it.
I am of Indian descent and moved to the USA in Mid 1970's. Model Railroads and Model Remote Controlled Aircraft are my two hobbies both of which I have been pursuing since my childhood in India.