I believe that NOT wearing apparel is the best way to level it up. I am a case in point and I challenge anyone (including WGT) to prove me wrong. Call me a liar if you want but pressure WGT to check there own stored files. I do not lie.
I wear 5 items of apparel. 2 of them are Swing Edge. The cap and the shirt. I MAXXED out the Swing Edge shoes, pants and glove while the cap and shirt still had OVER 1000 points to max out. It'll take me a year to max them out. I will admit I'm rusty on my odds and probability study but it looks to be something like 15,000 to 20,000 to 1 against that being able to happen. Either I'm the unluckiest player on the site OR it's rigged that way.