....without googling and just as good as you, Richard, in the knowledge & care of houseplants!, I go along with star..
For me, they've been as tough as old boots...like light but not heat, think you've had the watering right if you've kept it for 2 years (present spell of neglect excepted), so presume you've been watering from the bottom?...so praps a feed or scrape off a bit of the top soil & replace? And then, as star said, just water when the plant's dried out & never let it sit in water.