Epson Stylus Pro 7450 User Manual page 271

If the back of the printout is soiled or if there is a serious
problem of dirt on the inside of the printer, clean it using a
soft, clean cloth dampened with mild detergent. Then, wipe
the inside of the printer dry with a dry, soft cloth.
Caution:
c
Be careful not to touch the parts highlighted below; otherwise,
the printer may be damaged.
Maintenance and Transportation
271