With thin fingers & back ache you can probably do it from underneath removing the rubber under tray if you have it.
It is easier to take off the dash 3 or 4 screws (left right & in centre under the dash roll). Have a camera & towel handy. The towel catches the dash to stop scratches, the camera to take photos as soon as you can see inside as wires can come loose.
First disconnect the power. Put the towel between the wheel boss & dash. Open the doors. Remove screws & lower the wheel gently it should drop out.
I replaced not only the tubing but also the T piece as mine was leaking. Tie wrap the tubes to the spray nozzles.
Then just put it all back together.
