This is my in boat fish finder.Lately I have noticed the depth readings are all over the place most times.Sometimes 6',15' whatever(accurate),but most times reading #'s like 542,430ft etc,no where near accurate.Gradually been getting worse.Do you ever have to clean and scrub your transducer.?.Just washed mine with a good cleaning soap and rinsed.Looked a bit dirty but nothing serious.
Would this little maintenance make a difference?.In 6 years I have never touched it.Thanks for any help guys.
Dave.