Burping your 2nd Ferment?

[Butcha_Bear_84]

I've been reading a lot of these helpful posts. Most people are saying leave KT in 2nd ferment for 4-8 days, but they don't mention burping the bottles (letting out pressure from flip top bottles). I was just wanting some feedback on this subject.but

also has any one tried these products. this is what i'm using currently