The height of this space is generally adjustable in your cutting machine settings. Less space means better quality but also more difficult to remove. Check the exact resolution of your Z axis (engine steps and forward scraper properties) and set the low altitudes to use the full steps. Make sure you are within the heated colloquial temperature range advertised by the manufacturer. Especially when switching to smaller nozzle sizes, your extrusion settings must be successful.
Most cutting machines print the filler at the highest specified printing speed, while the contours print slower, for example. So the first place to notice too high print speeds is often the filler. Gradually decrease the print speed to test if it solves the problem because it can print too quickly. You will experience filling problems if you try to use a layer height that is too high for your mouthpiece or extruder. Stay at a maximum low height of 75% of your mouthpiece size (i.e. 0.3 mm for a 0.4 mm nozzle). Loose straps or pulleys that are not tightened properly ensure that the layers move because the required amount of travel is not reached.
Most cutting machines automatically increase the 3D printing speed of the filler or use an extrusion multiplier / line width greater than regular contours. This setting is often set proportionally by applying a multiplier to the general settings of your 3D printer. If you push your printer to the limit in terms of extrusion speed and volume, the filler is the most likely place to start failing first. So reduce your overall extrusion settings or find the modifier for the filler and reduce that.
Changes here do not affect the original mesh geometry, how the software processes it internally. The first option tells the software how to process small holes outside the model. Depending on your side, you may want to throw away these broken faces, or have the software fill these holes automatically. To automatically fill holes, you must enable Heal for behavior of non-multiple segments.
This can be one of the good reasons, such as printing too cold, too hot or too fast, using too much shrinkage or mouthpiece to close the bed, etc. But there are also some mechanical things to keep in mind, especially if the problem comes back after you clean it up. Both the / mm steps and the extrusion multipliers depend on the filament Camping and may change over time. Or it could just be a matter of changing the extrusion multiplier for a recent printout and you forgot to put it back to your cutting machine. Extruding at the beginning of an impression is often not due to the fact that the mouthpiece is too close to the bed or the problems mentioned in the previous sections.