Hi there. I have felt your pain and lived to tell and now have lovely, if not the same at all, new tatas.
Lets face it expanders suck and are painful, period. A good PS appreciates this, and will tell you so. My incision didn't close well. From my 3/9 mast to my 4/25 re excision surgery, I was trying anything the surgeon suggested, to. No avail. After my re excision surgery, which was basically to get in there, clean it out and re close it, he used surgical tape which stayed on beatifically for 4 weeks and I could shower easily, and I had no re issues. If you can, I would avoid removing the expander unless you have no choice and or do not want reconstruction, as you ultimately will have to go through it again, unless your PS is willing to do a direct to implant surgery with you, which is extremely rare and based on re surgical tata size, skin quality and skin taught ends as well as other factors. Let me know how you do and hang in there. A year later, I am very happy and feel great and even sleep on my tummy again!!!!!!