damn im sorry you are doing so crappy =/
when i had my picc what i did was use large zip locks. cut off the zipper end and cut open the closed end. then, like dustyd said put something absorbent over the top of your dressing, slide the homemade "sleeve" up you arm. i always found it more comfy to like....pull the excess together and tape it over you know? so that the plastic was tighter against my arm....haha lemme know if that doesnt make any sense at all.
i used a variety of different tapes, the best i found was silk tape. not completely water proof but strangely enough did the best job of sticking to me even in the shower.
this didnt allow me to like soak in a tub or have my picc arm directly in the shower spray, but it protected enough that i could use that arm to wash my hair, but still just try to keep it out of the direct water.
there is also this tape called Hy-tape or Pink tape...its the same thing, and i only tried it recently for ostomy stuff so im not sure how it would work for this but supposedley its really good waterproof tape. worth a try maybe.
oh also, i tended to use a LOT of tape when taping the ziplock on my arm, and after a while i started using the pieces more than once, cuz seriously you go thru those rolls fast. i would just stick them on the shower bar (not one in the shower itself of course) and they would dry and work just as well the next day. after a few times just pitch em and start over, but for me it was def worth it to reuse.
i have no advice as far as how to avoid the pain of ripping the tape off every morning =/
only to just do it quick.
where is your picc located on your arm? my most recent one was actually ABOVE my elbow, on the inside of my bicep area. so that kind of made it convenient cuz it left my elbow joint free to move and also less body hair there lol.
hope this helps, i feel so bad for you hun, still so sick when youve already done what was supposed to fix that! argh.
take care.