As per usual schedule Wednesday is ‘cleaning day’. This means removing cell build up (in the centre of colonies) and any differentiated cells prior to Thursday passage:

SK PHGL 1.1 P3:

Good colonies:

Before cleaning:

After cleaning:

SK PHGL 1.2 P3:

Good colonies:

Before cleaning:

After cleaning:

SK PHGL P3:

Before cleaning:

After cleaning;