Hefeweizen slow to finish fermentation

[Viralstrain]

Started with a Portland Hefeweizen kit bought from a LHBS and substituted the dry yeast with a smack pack wyeast 1007. After just 8 hours from pitching the yeast, the blow off tube was almost like a volcano. OG before pitching was 1.058 and at day 11 it was only down to 1.022. Here it's day 13 and I still have about 1/4" of krausen on top, and it's been sitting at about 68F. How long does this usually take in the primary? Should I just leave it till the krausen drops, or do I rely completely on hydrometer readings and ignore the fact that there's krausen still?

I'm new to posting and am excited to have found this wonderful online resource for home brewers.

(BTW, this is only my second batch of home brew ever)

On a side note, seeming how this is a hefeweizen, should I try to clear it up by adding gelatin in a secondary, or just leave cloudy?

Thanks in advance for all your input.

 

[SteveM]

If it was mine, I would just let it go for another couple of weeks before I checked it again.

As for the cloudiness, hefes are always cloudy anyway. I would leave it as is.