LP Sound Quality

Awhile back I purchased a used LP12 turntable with an Ekos tonearm, Arkiv cartridge with the Lingo power supply & Linto phono pre-amp. Running this thru a couple Klout amps to B&W Nautilus 802 speakers. Playing a CD or Tape the sound is great. Playing an album the sound is not very good. It almost sounds like the singer needs to clear their throat, it's kind of garbled, I guess is the word to use.
All I have is a couple brushes to clean the LP's (Discwasher & Bib).
Curious to what everyone uses to clean their albums & cartridge & also where to purchase? New to this analog stuff.

Thanks !!