I am reviving this thread, indirectly,
Phalaenopsis pathogens/fungus trial run
because I have also been experimenting. I use 1 ( uncoated ) aspirin per gallon of water and use this to water. I have noticed that the plant leaves are a lot more "olive" green and SEEM healthier. Obviously I cannot attribute all the good stuff to the aspirin regimen but I think I am going to continue watering with aspirin roughly every 2 weeks.
Has anyone else tried using aspirin ? I haven't used it in a spray as yet....