had this problem since august now ,changed the inline filter for the water & when i tried the dispencer it splutterd then after filling my glass it dripped .over time the dripping got less & less but because i was coverd by comet i got them out ,now after 6 visits & many part changes the problem is worse ,the water not shutting off for 8-10 seconds after filling glass .is this a common problem & could i fix it myself as the comet fitters hav’nt seen this before ?