You could take some 90 degree corner moulding the white colored stuff it is a high dinsity foam like material sold at Home Depot. Cut one edge off but leave maybe 1/4"-3/8" of an inch enough to make it have an angle that is higher than the angle the port is at. The long drip edge of about an inch and a quarter going toward the outside cut strips the length of the ports and clear or white silicone them in place. If the water cant pool it can''t run in. This might work well and it would cost very little and would not hurt the port frame in any way.