To make a long story pretty short. I had a very serious medical condition in July of 2018, 3 1/2 months in the hospital and about 13 months in a physical rehab center. Well I'm back home now and I finally had a chance to listen to my 2 channel system. It consist of a Peach preamp, an Njoe Tjoeb CD player, two MC250's and vintage Khorns. Well I turned the system on and it worked fine, at first. Then I turned the channel balance knobs on the peach and got a bunch of static from both speakers. I turned the system off and turned all of the knobs numerous times. I turned it back on and let it play for about one half hour. There was no more static when the knobs were in the same place, but the static started again when I turned them. Should I spray the controls with deoxit and see what happens or do you think there is a more serious problem? I don't want to damage anything. Can leaving a system idle for 15 months cause any damage.