Weekly. For the tack tack (bits, saddles, bridles, girths, boots, etc). Except for Candys dressage saddle, which gets cleaned monthly as it only gets used about 5 times a month. But the dressage girth gets clean after every use because its so easy (neoprene). And I use saddle soap conditioner stuff, never oil. Each horse has its own tack so that works well.. Well at least the leather stuff. Caseys synthetic bridle and saddle get cleaned yearly and after 2 years of use look brand new. Lol!
“Good things come to those who wait… greater things come to those who get off their ass and do anything to make it happen.” - Unknown