Quote Originally Posted by Roberts_Clif View Post
You were printing with ABS an then switched to PLA.Did you Purge the ABS from the hot-end by running PLA to the ABS temp and Pushing Extra ABS from the Hot-End.
I'm pretty sure I did - heated it up to 240 C, removed the ABS filament, then pushed the PLA filament through the extruder so that it (should've) caught all the remaining ABS.