Table 1.

Potential failure modes with associated strategies used by families to overcome them.

Potential failure modes	Strategies used by families to overcome failure mode
A. Remember to conduct the test	Plan to do test as part of a pre-established routine
	Set alarm or reminder
	Leave testing materials in line of sight (e.g., on the kitchen table)
B. Remember in which order to do the steps of the test	Refer to instructions while conducting the test
C. Cannot locate testing materials	Keep all materials in original box
	Keep all materials in a designated location (e.g., kitchen cabinet, desk drawer, supply drawer in child’s room, etc.)
D. Perforation on testing card package is small and hard to see/find	Keep scissors with materials and use those to open testing card package
E. Child or pet knocks testing card off surface	Set up testing card in a carefully selected location (e.g., out of the child’s reach, on a high countertop, within eyesight, etc.)
F. Cannot tell if there were 6 drops administered
G. Cannot remember how many drops to use	Write ‘6’ on the bottle to cue use of 6 drops
H. Cannot tell which end is the swab end versus the handle end when opening, potential for contamination
I. Child does not like swabbing	Do swab while child is sleeping
	Explain testing steps to the child verbally
	Have child do swab themselves (while coaching them, e.g., “swirl it like you’re swirling your French fries in ketchup”)
	Keep child in a comfortable/distracting setting (e.g., watching TV, counting, singing, etc.)
	Have child in a chair that supports child’s head and neck to prevent bucking
	Ask child which nostril to swab first
	Have another caregiver help restrain the child during swabbing
	Model test swabbing on oneself first
	Distinguish the test explicitly from a deep nasal swab
J. Fear of not getting enough sample	Do more circles in each nostril
	Observe swab to see if it looks wet
K. Sticker can be hard to peel off	Peel sticker tab off before swabbing (so that both hands are free)
L. Remember to go back to read results after 15 minutes and before 30 minutes	Set timer (e.g., using smart home system, stand-alone timer, or phone)
	Sit and wait 15 minutes in front of the card
	Place the test card in a location to cue reading it in 15 minutes (e.g., next to them at their desk)
	Write time of test administration onto the testing card
	Read results prior to 15 minutes passing
M. Confuse testing cards (if conducting test on more than one person)	Write name on the testing card
N. Read the lines due to poor vision	Use zoom feature on phone camera to observe results
O. Remember to record the results	Record test date and details while waiting and place the recording sheet next to the test card to cue recording results