Here is the growth tip I mentioned. I have more pics of both the spots and branch if people want to see different angles.

Okay, the "white spot" is really a damaged area, most likely due to some sort of rasping bug, like a slug or snail. And, your new growth appears to be affected with Citrus Leafminer, a very common and annoying pest. You should treat your citrus with either a Spinosad + hort oil spray (leave off the hort oil if your outdoor temps exceed 85 degrees, as the oil can damage the leaves if it is too hot), or, you can do a soil drench with Imidicloprid (Bayer Fruit & Vegetable Insect Control). You can search this forum for "CLM" or "Citrus Leafminer" and find quite a few threads on this topic. If you opt for a soil drench, you need to apply at least 2 weeks prior to CLM appearing in your area, to allow it time to get up to the youngest leaves. Controlling CLM is all about getting the treatment on or in the tree PRIOR to the little moth laying their eggs on the underside of the leaf, and then the hatching larvae burying into the leaves, and tunneling through the leaf, to eventually emerge and fly off as a teeny tiny moth.

Stop misting your tree. Citrus do not need to be misted, I am not sure how this idea gets circulated. They do just fine in very dry climates, such as mine, in the ground. Your potting medium is much too heavy, and will retain way too much water. Search this forum for "511" mix for a great homemade recipe for container citrus. Re-pot. Rain water, especially during a thunderstorm is great for citrus, as the rainwater during a thunderstorm is full of Nitrogen.

Fertilize with every watering. Most container citrus folks on this forum prefer to use DynaGro's Foliage Pro. It's a great liquid fertilizer with the perfect NPK ratio, and all the micronutrients that a citrus tree needs. We also supplement with a slow release product such as Osmocote Plus (also formulated appropriately and with a full compliment of micros).

And, to post multiple photos in one message, simply upload your photos to a photo sharing site such as photobucket.com. Copy the HTML code (ignore all the other possible code strings, just copy the HTML code), and paste that code string right into your message. You can do this as many times as you like. When you click "Preview Message", you should see your photos embedded right into your message. If you do NOT see the photos, but a code string, you've copied the wrong code string.

Patty S.