Spray + Talc Holder

So if you're using PEI, like on the Prusa Mk3, you want to be using alcohol to clean the bed between prints. You also want to keep some acetone to hand, to freshen up the bed every week or so.

Finally, if you use TPU or PETG on PEI, you may have notice it's got quite the tendency to adhere well. Very well. Cursing, swearing well. So use a little dusting of talcum powder on your PEI for either, and voila - they pop off like PLA*

This is designed for 2 x these refillable bottles:

https://www.amazon.co.uk/gp/product/B071GQNN4G/

And for the talc dispenser, one of these:

https://www.thingiverse.com/thing:735939

*NB: your mileage may vary. Don't complain if you screw up your PEI. If you happen to use these accessories, great! If not read up before you decide to give them a try. PEI can be finicky...