Lumpy strings on first layer

[dparrish]

Hi, I've got a Cocoon Create from Aldi (Australia) which appears to be a clone of the Wanhao Duplicator I3.

I've spent the last week printing almost a kilo's worth of PLA items but now I'm noticing a lumpy stringing in the first layer of the print.

This only happens in an area near (but not exactly) the middle of the bed, the rest of the first layer looks fine to me.

I've spend time cleaning the surface with alcohol and then re-levelled it.

The lumpy strings in this area feel quite rough. The lumpiness disappears after the first layer so it doesn't really impact the print, but the bottom surface isn't smooth.

Does anyone have any tips or suggestions for me? Picture (mid-print) attached.