Disruptive modifiers interrupt the connections between parts of a grammatical structure or a sentence, making it hard for readers to follow the progress of the thought.

In general, do not place a modifier between the to and the verb of an infinitive (to often complain). Doing so makes it hard for readers to recognize that the two go together.

In some sentences, however, a modifier sounds awkward if it does not split the infinitive. In such cases, it may be best to reword the sentence to eliminate the infinitive altogether.