No, we're not doing random drug tests on participants so you're not going to get swabbed!
An alternative to forking out about $200 for an Arctic Butterfly is buying a packet of CCD swabs.
Eking is a brand recommended by Rob Lewis.
Visible Dust also has a large range of sensor swabs. Visible Dust also provides a table so you can selecr a swab that exactly fits your sensor size.