AFEW is always bad and challenging. The unfortunate thing is that they blend into the coral and you cant see unless they move. The only thing you notice is bite marks.
People have used the below treatment and have had great success:
you will have to treat all acros and millis as well, and yes milis do get affected by AFEW's
The dip is betadine you can get it from Walmart for 10 dollars.
Step 1 - 3ml betadine per liter of tank water
Step 2 - Dip for 25 min
Step 3 - Gently dust the corals with your turkey baster
Step 4 - Scrape all eggs away that are visible
Step 4 - Wash the coral in tank water
Step 5 - Place it back in tank
You will have to repeat the above process once every week for 3 weeks. Then follow 3 more treatments 2 weeks apart. This will ensure that you have caught all AFEW's.
The corals will loose color during this time but will recover. It will take about 4-5 weeks for the corals to color back up.
I hope it helps.