What are you using? Hekate? (Like most people?) Or Switchblade?
If you're using Hekate, you can either add "kip1=nx-dreport.kip" to it's own section, [nx-dreport], and then you'll be able to choose it whenever you want to delete error logs.
Or you can throw it under [CFW] and it will wipe the error logs every time you load cfw. You need to make these edits in hekate_ipl.ini.
If you're using Switchblade. just throw the line on the bottom of switchblade.ini to delete error logs every time you use the switchblade payload.