<p>At the moment the outside surface temperature is around 30 °C. Can I put my PETG spools outside with a fan in order to dry them cheaply?</p>

[{'answer_id': 10453, 'author': 'Nach0z', 'author_id': 16621, 'author_profile': 'https://3dprinting.stackexchange.com/users/16621', 'pm_score': 1, 'selected': False, 'text': '<p>That looks pretty bad for a number of reasons. If you\'ve got an all-metal hotend, you can be pretty sure that your PLA issues are probably at least partially cooling-related. I\'d recommend you try and find a better fan duct design for your hotend, if possible, and possibly upgrade to a better fan.</p>\n\n<p>You can temporarily skirt around cooling issues with PLA in all-metal hotends by printing <em>more material</em>, which typically means one or all of the following:</p>\n\n<ol>\n<li>Faster print speeds (if your printer can move quickly enough and has good acceleration)</li>\n<li>Thicker lines! Surprisingly useful. If you don\'t want to sacrifice print detail, then make the infill lines ridiculously thick, the inner wall lines fairly thick, and the single outer perimeter "normal" thickness.</li>\n<li>Thicker layer height. Normally I printed at 0.2mm like everyone else, but with PLA in my all-metal hotend, I had to up it to 0.3 with fatter lines as well. </li>\n</ol>\n\n<p>If you can consistently keep the filament going through the hotend instead of lingering inside of it, you can basically "push" the melt zone back down into the heater block where it belongs, instead of it creeping upwards and resulting in a jam. </p>\n\n<p>As a side note, the rippled surface of your brim there looks very similar to what used to happen to mine; the ripples are usually indicative of some form of over-extrusion on the first layer. I\'d maybe look into checking your Z offset to make sure your print nozzle is far enough away from the bed, and maybe also check your flow rate is accurate for that particular filament. Check the filament diameter in a few places with a micrometer if you have access to one, and compare to your ABS prints to see if maybe you should adjust the flow rate down a few percent in your slicer.</p>\n'}, {'answer_id': 10465, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 3, 'selected': False, 'text': '<p>The answer to this specific instance appeared in the comments:</p>\n\n<blockquote>\n  <p>Also, <a href="https://3dprinting.stackexchange.com/a/6092/">a thorough cleaning of the nozzle/hotend</a> might also be a good idea to get rid of all the stuck ABS residue inside. – 0scar Mar 26 at 8:44</p>\n  \n  <p>The problem solved !, my ABS is stuck in nozzle !!! – 3ORZ Apr 25 at 6:52</p>\n</blockquote>\n'}]
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