To confirm that filament moisture is causing structural failure, inspect the extruded plastic for signs of micro-boiling, such as popping sounds during printing or excessive stringing/oozing. Examine the failed part for weak layer adhesion or brittle structures that collapse under the nozzle's movement. If the filament has been exposed to ambient air for an extended period, it is likely saturated with moisture, which prevents consistent layer-to-layer bonding and leads to print collapse.
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