Can You Use Should Instead of Will in a Conditional Sentence?

If plus present simple with will plus an infinitive. To talk about a possible future situation and it's possible result. If we're not sure if the result part will actually happen, we can use might instead of will. When I lose my umbrella, I'll buy another one. Catherine should always look after her umbrella. You shouldn't use the kettle if it isn't working properly. The two words I will can be shortened to I'll.