I have a Aqua Lab m2 system and my MAM valves are starting to leak water past the vave in idle mode. We noticed that water spraying out of tunnel arches. I have serviced the MAM valve with a MAM valve and spring repair kit. Sometimes the problem stopped. But twice now the problem has not gone away. I hace checked, cleaned and greased the o rings but the prob;lem persists. Any help here?