Well, I own a printrbot simple maker's edition ( the plywood one, in short ) and one small lesson I've learned with it is this :
Go for a printer with a heated print bed : It will save you many headaches.
Without heated bed : Check if the masking tape still is good enough for a print, if not, remove it and add a few new layers, prep the tape with some glue ( Only way I get something to stick ) and let it dry a little. Then you can attempt a print.
With a heated bed : clean up the glass plate, add some polyvinyl hairspray and you're good to go!
I'll second this about the heated bed. I have the Printrbot Play and I like it but I wish it had a heated bed. I have overcome most adhesion issues by printing larger brims on small prints. Then I have to cut off the brim. This wastes filament and adds another step to the process.
Go for a printer with a heated print bed : It will save you many headaches.
Without heated bed : Check if the masking tape still is good enough for a print, if not, remove it and add a few new layers, prep the tape with some glue ( Only way I get something to stick ) and let it dry a little. Then you can attempt a print.
With a heated bed : clean up the glass plate, add some polyvinyl hairspray and you're good to go!