Baking Soda as Drain Cleaner

You know your pesky bathtub drain that you cannot take off so it is nearly impossible to clean it or snake it to get it to unclog?  Ours has been moving slow lately and I saw this pin on Pinterest and I thought it would be perfect to try. So I went about following the directions and trying to get my drain to move faster.  In the end it worked a little bit, I noticed the drain moving a little faster but not fully free.  I think a bottle of drano or trying to get a snake down there will still work better and will be more cost efficient than the baking soda.

RESULTS
PINS DOWN
**- effectiveness
***-time spent
**- cost
UPDATE!! - one week later and my tub is draining worse than before :(