[printed model not solid.]

All,

Recently, all my printed models not solid and the outer layer can be peel off easily.

I'm using PLA and my setting are below.

Layer Height = 0.2mm

Shell thickness = 0.8mm

Bottom thickness = 0.4mm

Fill Density = 100%

Infill overlay = 20%

Print speed = 70mm/s

Kindly help. thanks.

regards,

TM