To flush the TIP easily down, please remember that this must be soaked with water, otherwise is still too much air in it.
As a rule, the normal cleaning process is sufficient so that the Tip has enough water and no more air.
If the cleaning process is too short, leave the Tip in the toilet water for a short while before flushing it down.
If these points are respected, there are guaranteed no problems.
NOTE: Never rinse several Tips at the same time, otherwise (as with too much toilet paper) there may be a risk of clogging.