I generally start my spring-cleaning of houseplants in February. There are lots of bright, sunny days & the plants just seem to crave a bit of T.L.C. after my 3 months of neglect.
The soil in the pots could also do with a bit of topping up with sterile potting soil - there are some blends just for houseplants or use your seed starter soil. I like to fluff the soil a bit first with a fork or my fingers, especially around the edges of the pot, to encourage the older soil to blend in a bit with the new soil. After a few months of neglect, the soil sometimes doesn't absorb water like it should. When I bring back regular watering, I usually put my plants in the sink & let them soak for 10 to 15 minutes in a few inches of water to ensure that they are actually getting watered. If you notice your soil just won't soak up water, it may be time to repot the plant & start with new soil.