Differences

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--- first_layer_adhesion [2026/06/30 19:00] – dshoop
+++ first_layer_adhesion [2026/08/03 23:55] (current) – dshoop
@@ Line 14: / Line 14: @@
 [[cleaning_the_bed_plate|Clean the Bed Plate]]
+=== Residue from incompatible materials ===
+Clean your build plate when switching between filament types (e.g. from PLA to
+PETG), or use a dedicated build plate for each material type. Alcohol will not clean the sugars residue on build plates left by PLA. Use a clean ScotchBrite bag with dish soap and hot water to remove any residues. Always leave plate to air dry.
+=== Plate oxidation ===
+Over time the PEI build plate coating and texture can oxidize. Scrub very gently in hot soapy water with steel wool. Rinse well and air dry.
 ==== Bad Z Offset ====
@@ Line 29: / Line 38: @@
 ==== First layer speeds too fast ====
-Try slowing down to 30mm/s.
+Try slowing down to 20-30mm/s.
 First layer speeds depend on filament material and other factors. Speeds for first layers tend to be under 60mm/s and as slow as 20mm/s for some filaments.
@@ Line 47: / Line 56: @@
 No. Glue on a PEI bed plate is used to form a separation layer to prevent printed parts from binding to the bed plate.
-Glue was used on older types of printers that had glass or other material beds than textured PEI which grabs far sticker than glue.
+Glue was used on older types of printers that had glass or other material beds than textured PEI which grabs far sticker than glue. Textured PEI is orders of magnitude more grippy to plastic than glue.
 If glue is "working" for you then it's just sweeping the root causes of the poor bed adhesion under the rung and will still manifest as other issues.