Poor Sophie! And poor
you! What an awful experience! We could all tell how very worried you were just from the tone of your writing. I'm so glad it's all over now. And, really, if you hadn't been so insistent on getting help, you might never have picked up Sophie's infection. So, well done you!
You might be surprised at Sophie's reaction to the blow dryer. I thought my Beaks would have a fit when I pointed it at them, but after just a few minutes they carried on just as they do when I'm bathing them. They fluffed up all their feathers, spread their wings and 'bathed' in the nice warm air! LOL!
Start with the dryer on a warm setting and mid strength 'blow'. Stand a good distance away from Sophie so she's not getting a blast of air to frighten her. Watch her reaction and if she's OK with it, move closer to. It's very important to keep the dryer moving because if you just blow in one spot continuously you can burn Sophie's delicate skin and hurt her. She might not be happy to be blow dried ever again! Once she gets used to being blow dried, you might try turning the 'blow' up to full strength.
These days, the Beaks like to sit on my head and swing off the end of my plait while I'm drying them. It's so funny!!! I'd take videos, but I'd need another pair of hands for that. They really like the full blast of the air on their feathers and will turn round and round to make sure they get dried all over. I love being able to give them little pleasures like that.
PS. One last thing: don't dry Sophie until she's bone dry. Leave her to air dry the last little bit: in this way, you can be sure you're not overdrying her and giving her an itch or scaly skin problem.