@Newplantmom, you are going to probably find this hard to believe, since somehow you have been led to believe that plants need a miniscule amount of water to do well. During the spring and summer months I water my fiddles every other day, and I am drenching them with a hose. If the temperature gets mid-90's, they can handle watering every single day. During winter months (and this was when they were all brought inside because I lived in NE Mississippi), I watered them weekly , usually every 4-5 days. Again, I am watering with a hose, not adding a cup here or a cup there.
Keep in mind that these are tropical trees. In nature they reach heights of 40-60'! Just because we have sort of tamed them to grow indoors, that doesn't change their genetics. They are water-hogs if you grow them in anything close to good conditions. At least that has been my experience in growing 100's of them over a 25+ year span. I have literally preached to folks to shade their plants from direct sun between the hours of 11:00 AM till 4:00 PM, regardless of the plant. That is of course for plants that don't need direct sun, and most houseplants fall into that category. Early morning and very late afternoon sun is great though. If there is any way for you to put your fiddle outside during the spring and summer months, the plant will perform much better for you. Mine grow under the shade of large oak trees from April until October, getting dappled sun all day but direct sun only during those early morning or very late afternoon hours. They thrive growing this way.
Do me a favor and go to your "Profile". Update that information, showing your location. Knowing where you are growing your plants is very helpful when asking for or giving information.
Here is just a sampling of what I grow. The first photo is a 25+ yr. old fiddle.