Меньше нити от половины до конца

поскольку некоторые принтеры (мой принтер Geeetech i3) со временем печатает все меньше и меньше нитей:

Обратите внимание, что начало напечатано хорошо:

Мои настройки для этой печати (Slic3r):

; avoid_crossing_perimeters = 0
; bed_shape = 0x0,200x0,200x200,0x200
; bed_temperature = 60
; before_layer_gcode = 
; between_objects_gcode = 
; bridge_acceleration = 0
; bridge_fan_speed = 100
; brim_connections_width = 0
; brim_width = 0
; complete_objects = 0
; cooling = 1
; default_acceleration = 0
; disable_fan_first_layers = 3
; duplicate_distance = 6
; end_filament_gcode = "; Filament-specific end gcode \n;END gcode for filament\n"
; end_gcode = M104 S0 ; turn off temperature\nG28 X0  ; home X axis\nM84     ; disable motors\n
; extruder_clearance_height = 20
; extruder_clearance_radius = 20
; extruder_offset = 0x0
; extrusion_axis = E
; extrusion_multiplier = 1
; fan_always_on = 0
; fan_below_layer_time = 60
; filament_colour = #FFFFFF
; filament_cost = 19.99
; filament_density = 0.945
; filament_diameter = 1.75
; filament_max_volumetric_speed = 0
; filament_notes = ""
; first_layer_acceleration = 0
; first_layer_bed_temperature = 60
; first_layer_extrusion_width = 0.4
; first_layer_speed = 30
; first_layer_temperature = 220
; gcode_arcs = 0
; gcode_comments = 0
; gcode_flavor = reprap
; has_heatbed = 1
; infill_acceleration = 0
; infill_first = 0
; interior_brim_width = 0
; layer_gcode = 
; max_fan_speed = 100
; max_layer_height = 0.4
; max_print_speed = 80
; max_volumetric_speed = 0
; min_fan_speed = 35
; min_layer_height = 0.15
; min_print_speed = 10
; min_skirt_length = 0
; notes = 
; nozzle_diameter = 0.4
; only_retract_when_crossing_perimeters = 1
; ooze_prevention = 0
; output_filename_format = [input_filename_base].gcode
; perimeter_acceleration = 0
; post_process = 
; pressure_advance = 0
; printer_notes = 
; resolution = 0
; retract_before_travel = 2
; retract_layer_change = 0
; retract_length = 2
; retract_length_toolchange = 10
; retract_lift = 0
; retract_lift_above = 0
; retract_lift_below = 0
; retract_restart_extra = 0
; retract_restart_extra_toolchange = 0
; retract_speed = 40
; skirt_distance = 5
; skirt_height = 1
; skirts = 2
; slowdown_below_layer_time = 5
; spiral_vase = 0
; standby_temperature_delta = -5
; start_filament_gcode = "; Filament gcode\n"
; start_gcode = G28 ; home all axes\nG1 Z5 F5000 ; lift nozzle\n
; temperature = 220
; threads = 4
; toolchange_gcode = 
; travel_speed = 120
; use_firmware_retraction = 0
; use_relative_e_distances = 0
; use_set_and_wait_bed = 0
; use_set_and_wait_extruder = 0
; use_volumetric_e = 0
; vibration_limit = 0
; wipe = 0
; z_offset = 0
; z_steps_per_mm = 0
; adaptive_slicing = 0
; adaptive_slicing_quality = 75%
; dont_support_bridges = 0
; extrusion_width = 0.4
; first_layer_height = 0.2
; infill_only_where_needed = 0
; interface_shells = 0
; layer_height = 0.15
; match_horizontal_surfaces = 0
; raft_layers = 0
; regions_overlap = 0
; seam_position = aligned
; sequential_print_priority = 0
; support_material = 0
; support_material_angle = 0
; support_material_buildplate_only = 0
; support_material_contact_distance = 0.2
; support_material_enforce_layers = 0
; support_material_extruder = 1
; support_material_extrusion_width = 0.4
; support_material_interface_extruder = 1
; support_material_interface_extrusion_width = 0.4
; support_material_interface_layers = 3
; support_material_interface_spacing = 0
; support_material_interface_speed = 100%
; support_material_max_layers = 0
; support_material_pattern = pillars
; support_material_spacing = 2.5
; support_material_speed = 60
; support_material_threshold = 60%
; xy_size_compensation = 0
; bottom_infill_pattern = rectilinear
; bottom_solid_layers = 3
; bridge_flow_ratio = 1
; bridge_speed = 60
; external_perimeter_extrusion_width = 0.6
; external_perimeter_speed = 50%
; external_perimeters_first = 0
; extra_perimeters = 1
; fill_angle = 45
; fill_density = 25%
; fill_gaps = 1
; fill_pattern = honeycomb
; gap_fill_speed = 20
; infill_every_layers = 1
; infill_extruder = 1
; infill_extrusion_width = 0.4
; infill_overlap = 55%
; infill_speed = 80
; overhangs = 1
; perimeter_extruder = 1
; perimeter_extrusion_width = 0.4
; perimeter_speed = 60
; perimeters = 1
; small_perimeter_speed = 15
; solid_infill_below_area = 5
; solid_infill_every_layers = 0
; solid_infill_extruder = 1
; solid_infill_extrusion_width = 0.4
; solid_infill_speed = 30
; thin_walls = 1
; top_infill_extrusion_width = 0.4
; top_infill_pattern = rectilinear
; top_solid_infill_speed = 15
; top_solid_layers = 3

Я пробовал другие нити (PLA) и более высокие температуры (190-240). Я также почистил сопло.

Как называется эта проблема и как ее устранить?