Epson P6000 Yellow Channel Clog

The P6000 ran for 14 months with no issues now I’m getting horizontal micro banding across the whole picture when using Canson Baryta paper. This can be seen mostly in the skys. I’m using the Piezo Pro ink set. If I can not get the nozzle to clear can I switch the yellow and Gloss Chroma Optimizer (GCO) and remap the channels in the professional tools software.

Thanks
John

It seems that some how on the printer the platen gap got changed from Narrow to Wide. I set the platen gap back to narrow and -.30 on the feed and all is well again. The yellow has one line at the bottom that is faint but is there now.

Thanks
John