I've been using trombotine for freakin EVAR. My first trombone teacher in New York gave me a tube when I was in... 5th grade?
I'm going to be a junior this coming school year, and I still have that same tube of trombotine. That sh*t lasts...
See, the trick is knowing how to apply it right.
The 5 Steps of Lubing Your Slide (as patented by Fr34kt)
1. Use a cloth to THOROUGHLY wipe off any residue on your inner slide.
2. Obtain a pea sized amount of your slide cream and apply it to the stockings
only (wide part of the inner slide).
3. One side at a time, put the inner slide back into the outer slide to and work it up and down a few times on both side (this spreads the lube to the inside of your outer slide).
4. Remove the inner slide and wipe it off again (this step is critical to prevent scummification. All the lube you need has already been applied to the inside of your outer slide).
5. Spray the inner slide with water. You're good to go!
Also, you have to make sure you do it often enough. And for cripes sakes keep yer slide wet! *shakes cane* I guess this is why my section calls me obsessed with trombone maintenance...
I have used Slide-o-Mix before, I find that while initially beyond really good, it tends to make my slide scum up. Meh... *shrugs shoulders*