A good quality , sharp blade such as a Mach three will do the job .. shaving foam and just shave either side in a strip and then shave from your hole outwards in a circle (hope that makes sense )
I shave completely every other day and my bum once a week ... The feeling of cleanliness is superb . It only hurts if you let it grow back ! I found that once I started doing it I never looked back ..... I find that standing up with one leg up on the side of the bath is a good position.. you don't need to see what you are doing .... just be confident !
If you are into receiving a bit of rimming , an anal douche is recommended . I would hate to think that I was anything but 100% clean .
They are cheap from a firm like Bondara .. but always use lube - you can easily scratch yourself without...
Without going into graphic details - you'll be surprised what is dislodged ! ... and quite a plaesant sensation !