This is a tricky situation, make sure you have wudu before applying the gel. The creams need to be absorbed into the skin. Their job is done within an hour. After 1 or 3 hours you should be able to wash your face.
Incase you apply cream and then break your wudu, tayammum is not suggested since tayammum is done only in extreme circumstances. You just need to reapply the gel.
Shaykh Abu Eesa answers and explains...
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