The TM24 Pro is one of my favorites as well. I always drip through the drip tip with three quick presses from the juice bottle and spitback hasn't ever been a problem for me.
There are a few tips that may help you prevent spitting in general.
Do not overdrip. Yeah. Obvious.
Wait a few seconds after dripping or pulse the coil lightly to let the juice distribute equally, before you take a vape.
Pull the cotton through the coil as tight as possible without deforming or moving the
coil.
Do not overstuff the juicewell. If you overstuff, the juice will pool up between coil and wick in the well, which causes terrible spitback. Let the wicktails barely touch the bottom of the well.
The coil itself may contribute to spitback as well. A 24/32 clapton is much more prone to that than a 26*2/40 for instance.
Use the right amount of power for your chosen coil. Not enough or too low power may cause your juice to bubble rather than evaporate.