Welcome to the Quilting Board!
Another 15-91 lover here. I have one at the cabin and one at the winter place..... and I found one for my SIL who spent several days with me doing FMQ and ask me to look for one for her. It does the best FMQ of any machine I've tried... and I've tried a few.
And you're doing a nice job cleaning her up..... lovely!!
I'd rather spend money on my quilting hobby than the therapist.... I'm probably $$$ ahead.... and I'm happy!!
The can comes with a straw and I only spray the screw. I didn't get the spray all over the place.