Above are the scientific facts, but some gardeners claim that organically grown fruit tastes better.
Based on this claim, below are some ideas that just might give you tastier fruit, though none of what I am about to write below is scientific. What follows is based only on hearsay, and I do not know for sure that it will work.

If your tree is growing in a lawn the frequent intervals of watering might be detracting from the flavor of the fruit and make fruit watery. You might get better fruit if you spread out the intervals between irrigations to once every two or three weeks and then watering deeply for several hours instead of watering all the time and often.

Additionally, fertilizing with Sul-Po-Mag ( to provide potassium) is said to increase sweetness. Feeding with with manure and blood meal (to provide nitrogen) is said by some to increase flavor, and seaweed extracts (to provide trace minerals) are also said to increase flavor and health of citrus trees. Also apply John and Bob’s Soil Optimizer according to package directions. This product unlocks the natural nutrition in soil.
These steps might help your fruit taste better but I cannot guarantee it, since as I stated above, flavorful citrus usually results from fruit grown in a climate with some interior chill—though not too much—along with a good rootstock and variety.

If you have been fertilizing with commercial synthetic fertilizers some gardeners feel that this way of fertilizing subtracts from flavor while the organic fertilizers I have named here may improve flavor. Also, make sure the tree has adequate trace minerals. If the tree has yellow leaves with green veins, even after you apply seaweed extract, then also apply chelated minerals according to package directions to correct chlorosis. Chlorosis (lack of trace minerals causing yellow leaves with dark green veins) often comes from overwatering of citrus growing in clay soils.