There's a certain element to technique to it, but there are a few factors that could be at play.
Are you getting backwash on test pulls, or during, or after (the clear) a hit?
Is it just crazy stacking all the way up, or little droplets shooting up and hitting you?
Do you have any other high diffusion glass you could compare it to?
Anyways, here are some tidbits that might help.
- sometimes pulling too hard can cause your bubbles to pop, resulting in lower stacking, but more little droplets flying up towards your mouth. I find this more-so on test pulls, than puling harder to clear a hit.
- water seems to get a bit stale after a session or 2, and can get really frothy leading to crazy high stacking. A similar effect is caused by rezblock, though not as pronounced IME.
- try adjusting your water levels a bit. A higher water level can sometimes lead to less stacking in a piece, so counter intuitively, it may actually help to put a bit more water in the piece.
less water should also lead to less instances of splashback, but can lead to less satisfying diffusion
- try just not pulling as hard (this is only really a good recommendation if you aren't getting splashback during the actual hit, but get it on the clear).
Sometimes when I'm clearing one of my fritter pieces, I notice the water coming up higher than usual, and either slow my draw speed, or stop hitting it entirely for a second. Let the water settle and finish the clear.
As I said, this one is only a viable option for when you're getting intermittent splashback when clearing, not during the hit.
(I voted never
)
Edit:
Also, I don't think I pull particularly hard...
I don't try to pull softly, but also don't necessarily try to rip as hard as I can.