Canon EOS 1300D - Manual (Page 204)

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If dust adheres to the image sensor and dust spots appear on the
images, you can clean the image sensor yourself with a camera blower.
Before cleaning the sensor, detach the lens from the camera.
The image sensor is extremely delicate. If the sensor needs to be
cleaned directly, having it done by a Canon Service Center is
recommended.
1
Select [Clean manually].
 Under the [52] tab, select [Clean
manually], then press <0>.
2
Select [OK].
 Select [OK], then press <0>.
 In a moment, the reflex mirror will lock
up and the shutter will open.
3
Clean the sensor.
4
End the cleaning.
 Set the power switch to <2>.
3
Manual Sensor CleaningN
If you use a battery, make sure it is fully charged.
For the power source, using DC Coupler DR-E10 (sold separately) and
Compact Power Adapter CA-PS700 (sold separately) is recommended.