Question: The crucible was not cleaned and dried before its mass was originally determined.
Is the influence on % water for a hydrate higher, lower or not affected by the error.

The crucible since was not cleaned can affect the compound in it as it can lead to absorption of the available water molecule.So this will lead to an increase in the water percentage in the compound.

For example:When dealing with NaOH it is advised to have clean dishes as its hygroscopic.