I would suggest you some tips to how you remove your website spam score.

1. Filter your Analytics traffic

2. Block the known bots and spiders

3. Add your own spam referrers

4. Setup a bad referrer filter

5. Block traffic from specific countries

6. Ban bad bots

All it takes is a few minutes to set up these filters and you’ll successfully eliminate 99% of spam. And, if you spend a few more minutes every month updating your filters, you’ll be even better off & you will get more useful data.