One of the most frequent causes of houseplant failure is over-watering. to avoid this, choose a pot with holes at the bottom to release excess water. Some pots come with a saucer or you can double pot by placing a plain (plastic or clay) pot with holes inside a decorative one with no holes. You should water until water begins to leak from the holes at the bottom of the pot. Be sure to remove excess water from the saucer or outer pot. Waiting 1/2 hour will allow the plant to absorb some of the excess water.
Sometimes the soil gets so dry in winter, it pulls away from the edges of the pot and water runs right through the pot into the saucer. A shower will not only clean the leaves, it allows you to saturate the soil.
Some people put stones in the saucer or in the bottom of the outer pot to allow some excess water to evaporate. This is done to increase humidity around the plant but the water level should be low enough to keep it above the excess water.