This is useful because you don't have to put your cube on the ground and press the button, because it will most likely bounce ;p (also useful for more perfomance).
For this you will need BEE mod
So first things first, let's create this really basic logic gate.

- The laser needs to be pointed at the catcher, and start activated
- Connect the NOT Trigger to the panel (deactived btw)
- Connect the catcher to your Gel dropper
Now let's go to the Gel Dropper section:

- The Gel Dropper needs to start deactivated
- Connect the Trigger Multiple 1 to the NOT gate
- Connect the Trigger Multiple 2 to the angled panel
There! You now have a fully functional automatic cleanser.
I discovered this by myself
I like making logic gates on puzzlemaker.
