An electronic device may include electronic device structures that are attached with a moisture and light curable adhesive. To assemble the electronic device, adhesive may be dispensed onto a first electronic device structure. An attachment structure may then be used to attach a second electronic device structure to the first electronic device structure. The electronic device may be tested with testing equipment. If the electronic device needs to be reworked, a separation tool may be used to separate the first and second electronic device structures. After separating the structures, residual moisture and light curable adhesive on the structures may be exposed to light to ensure that the moisture and light curable adhesive is fully cured. The moisture and light curable adhesive may then be removed without leaving any residue on the electronic device housing structures. The electronic device structures may include an electronic device housing and a cover glass.