Please tune your piano 1-2 times a year, your student will benefit as well as your instrument!I tune mine after regularly turning on the A/C in the summer & the heater in the winter. If you need a piano tuner, the piano tuner I use is David Lukitsch, (312) 659-2153. Be sure to mention you are my student if you use him.
If possible, pianos do best away from outside walls/windows and heating vents.
Dusting also helps keep instruments in good shape, I wouldn't use dusting spray though. Alcohol will crack keys, to sanitize only use a bit of soapy water and wipe keys then dry.