Glue sticks for print bed I would like to get a green tombow PITS adhesive stick. On Rakuten, it costs \$1 (USD). On my 3d printer's (XYZ) retailer's site, it costs \$20 (USD). Due to the costs and the fact that Rakuten does not ship to my country, I need an alternative. I am currently using Davinci 1.0 for my bed, which I believe is a glass bed. So, my questions are: 


What glue is best for PLA plastic?
What glue is best for ABS plastic?
Is there a glue that functions with both types of plastic?
As mentioned by Matt - PVA glues work perfect for both filaments.
It works well because it's softening temperature is between 45..85C so it's more or less temperature of HB.

Advantages:


cheap
easy to apply on HB
can be applied on cold as same as on hot HB
sticks model very well
non toxic, no solvent, odorless
easy to wash (from HB) (just wash it under water or scrape with sharp tool)
works very well even with old and dry layer of glue


Disadvantages:


quite hard to detach model (I use paper knife)
first layer is not glass-perfect
after detaching, model is a bit sticky (first layer)


I use Scotch Glue Stick by 3M.