Hans Grohe ShowerArc 26396001 Installation Instructions / Warranty page 27

Cleaning the Handshower
The handshower uses the Rubit™ cleaning system. If
scale deposits are noticed in the spray channels, rub
across the channels with a finger or a sponge to dislodge
them.
If necessary, pour about 3/4" of a commercial scale
remover, such as Lime-Away or CLR, into a shallow dish.
Soak the spray face for the amount of time shown in the
label instructions.
Rinse the spray face with clear water.
Reinstall the handshower. Flush the handshower for at
least one minute before using.
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