Then keep the solution still for 15 mins to let the oil out.
Need to introduce DM1 after 50dm2/L and 100dm2/L, to check the oil removal amount by feeding DM1.
Then confirm again the cleaning power before and after DM1 added.
This will be an option for introducing to our customers, our system has the " refreshing, reactivation " methods to keep the bath more longer life.