Yes, you may want to clean her up.
Give her a good soak in a warm epsom salt solution. If her bum is poopy wash her with a little soapy water first (a drop or two of dish soap is fine). Then give her a soak in some epsom salt water.
Check her vent and surrounding tissue for any signs of wounds to make sure the worms your are seeing is actually internal parasites (cecal worms, round worms, etc.) and not maggots in a wound. Wash/flush the area really good. If you have her inside with the A/C going, dry her off well or you can use a hair dryer on low/cool to help dry the feathers a bit, you don't want her chilled.
I know it sounds disgusting and it can be. I haven't encountered worms yet, but dirty bum(s) I have. It just takes a little time, wear gloves and start working the soapy water into the vent feathers (a lot of it is fluff so it's not too bad). Once you get going, you will do just fine. Talk to your "patient" - she may talk back and you can have a conversation
I've found that slow movement(s) and a calm soothing voice really helps. Have everything you think you may need ready. Extra water, towels, a wound ointment/spray if you encounter any wounds, gloves, etc. A helper is great if you have one, but you can do it just fine by yourself.