Is it OK for TBI injectors to "drip" at idle??

I've been chasing a cold start rough running problem - tune up, new EGR, CTS, coil, etc - and while it's been getting progressivley better - it still isn't fixed entirely.

So today I decide to check the "spray pattern" of my TBI injectors - knowing nothing more than there should be a cone pattern.

At idle, both are spraying a cone but the drivers side injector also has fuel dripping from the tip, in the midst of the cone pattern. The one side of the cone pattern looks a little less fine and even than the balance.

By moving the throttle, and burping it to WOT, I cease to be able to see the drops anymore, but as soon as it's back close to idle, there it is again, drip drip drip.

I realize this isn't normal - but could it be a problem?

Can I fix that - or do I have to replace the injector? If I am to clean it, how do you clean a TBI injector - there's no rail to plug into - do I try and dump crap in the tank and plug my filter up?

Any insight would sure be appreciated!