While travelling in Ac coaches, try to travel only in A1 or B2. those are new coaches.
A1 is made in 2013-14 and B2 is made in 2015 with biotoilets and charging points on side berths.
other ac coaches are made in 2000s.
coaches are clean throughout the journey{A1} as this train has onboard cleaning staff for ac coaches.
sorry,i...
more... have no idea about sleeper coaches.