I am sure some of those on PICC already know about this but for those who don't - I found that the Dry Pro PICC line sleeve works pretty well for keeping it dry. For those who will have a PICC line for a couple months - it makes sense. Its a bit expensive but after using bags, tape, saran wrap, etc. for a week and getting annoyed - I bought this.
Works well but can be a bit difficult to get on by yourself - especially if you have a sore arm from the placement but its certainly possible and has given me more autonomy with showers, etc. With someone else's help, its a breeze.
Make sure you buy the right size and cut to adjust carefully. You can't put material back on!
Here are the links with reviews and how to buy (to Amazon, Allegro (third party seller) and the manufacturer). If you buy from Amazon by clicking on the link on Lymenet - they will get some money so everyone wins! Amazon I think has small medium and large. The sizing instructions can be found on the Allegro or manufacturer site. Some of the reviews on the Allegro site are average but if you take your time - I think it will do its job.
I have no skin in the game here - just wanted to pass along what worked for me.
Looks great; thanks; I'm going to order one. I can already say the cost of Saran Wrap and tape will outstrip this within a month I think, so overall it will probably save money.