Minecraft effects do not go away?

To
2

Me and a friend always play Minecraft Pocket Edition. Only another friend threw throw potions on the ground for fun and the particles of the potion are no longer off the ground. We already tried to raise the tickspeed but it did not work. The particles are already there for days and in the settings you can't issue the (there's also no Optifine for MCPE). With the particles it jerks a lot, which is why we absolutely need a solution, on the Internet we have already searched and found nothing. Would be nice if you could answer.

an

Stand next to / in the particles and enter / kill @e [type =! Player, r = 10]! ATTENTION: case sensitive!

This deletes all entities (except players) in a radius of 10 blocks - so also the particles.

To

Thank you very much