Trying to print with PETG

I have a problem with PETG. The filament gradually wicks up the nozzle until enough accumulates to drop and blob my print. I have installed a 50w heater in my hotend so that I could increase the temp. The hotter I got, now up to 280C the less the filament wicks up the nozzle.

The vendor recommends 220C to 250C and 30mm print speed and a phone call recommended a 95% flow rate. Has anyone gat a strong PETG with workable settings?

I want to USA filament. Hatchbox is by far the best, but Chinese.
Florida Filament is very inconsistent but strong
LLDmax is fairly strong with a very narrow range that changes roll to roll
Greengate I can never get to not blob

I must be doing something wrong as it is a commonly used filament.


At 280C print temp with LLLDmax PETG I have reduced the amount of filament wicking up nozzle to below the accumulation that will drip onto a 4 hour print. I have to clean off the exterior of the nozzle after every print. With a retraction of 1mm@20mm/sec I still get crap in the holes. I will now see if there is a retraction that will give me clean holes.

 

I am surprised by the Temp I am using with PETG. PETG is not as strong as GST3D PLA+ by a large margin. I have to beef up my designs when using PETG. So far, going down in flow rate and increasing Coasting (now at .2) is improving stringing. I have not yet optimized the values, but when I do I will post the results.