Blobless

Agreed...It sounds like the nozzle needs to be tightened when heated, and was probably accidentally tightened when cold. You can do an atomic/cold pull before changing the nozzle to make sure debris is not preventing the nozzle from tightening all the way.

We've been using Layerneer Bed Weld on our Ultimaker 3's borosilicate glass. It holds PLA, ABS, and PETG to the bed without needing any brims or rafts and then releases it when the bed cools to room temperature. It last several prints, can be recharged with a wet sponge, and comes off pretty easy with water. Warm soapy water seems to make it even easier to remove. For ABS we like to set our bed temp to 80C and that is enough to avoid warping while still releasing parts easily when cooled. It literally pops and snaps as the part detaches. Usually we can lift the part off the bed by hand. If we go up to 110C we get really extreme adhesion which is sometimes desired, but makes it difficult to remove the part. When this occurs we cool the bed to room temp then stick it in the freezer for 10 to 15 minutes. When we remove the bed to a room temp environment the bed condenses with fog. With the coating being water soluble it releases the part with no effort. It's kind of cool hearing all the popping and snapping as the part releases itself! It doesn't have any harsh chemicals or smells so that is a plus.

I'm also running into issues with material selection with the latest version of Cura. Here is the scenario. 1) My printer runs in my garage and I connect to it via Wi-Fi. 2) I place my spool of Ultimaker Nylon Clear in an external dehydrator so NFC detection is not possible. 3) When I load the filament the Ultimaker understandably can not detect the filament and request that I select a filament. It only list the generic filament types so I select Nylon. 4) I set the material type in Cura to the proper Ultimaker Nylon Clear and attempt to print my object. 5) A warning appears due to the mismatch in the generic Nylon filament selection on the printer, and the proper Ultimaker filament I selected in Cura. It requires action on the printer so I need to physically go to the printer to confirm the override. 6) The feedback from my confirmation on the printer never seems to make it back to Cura so the print is still stuck in the queue. 7) In order to get it printing I have to disregard the error message in Cura Connect which then starts the print with the Generic Nylon instead of the desired Ultimaker Nylon Clear type. I have not found a way to print with the proper Ultimaker Nylon selected when not using the NFC detection. It also happens with PLA, and ABS. Anyone else encounter this or have a work around?