Just put mine on, and fortunately, I didn't break anything. In fact, I didn't even do anything fancy. Before putting them on, I pulled the goggles back, then placed the visor on her face and slowly slid the band down her head.
I didn't wet her hair first, I just layed her on my lap and used both hands to apply firm, even pressure as I slid the band down. Once it was on, i adjusted the visor, then made sure the band was as far down as it needed to be.
However, it was at this point that i realized i needed to rotate the goggles and panicked a little. Luckily I was able to rotate the goggles around to the proper position so they look like cat ears now.
I have to say, it was pretty tense making the adjustments, all while waiting for any of the pieces to snap. I'm really happy I was able to get it on without breaking anything and won't be touching a thing moving forward.