#1
I've recently started sweeping on more than one string or licks. The thing is, I'm having trouble keeping the licks clean when I switch from string to string. Anyway you guys know about going about this?

(I'm talking about riffs like
- - - - - -- - - - - - - -
- - - - - - 12-5-7-9
12-5-7-9- - - - - - -
- - - - - - - - - - - - --
- - - - - - - - - - - - -
- - - - - - - - - - - - - but one right after another.
#2
Try to do it faster and mute the strings with your palm and / or try putting a headband of sorts on the first fret, helps to keep strings from ringing out.
Existence well what does it matter.