I have trouble maintaining a clean, dry field when placing sealants, especially in pediatric patients. Do you have any suggestions?

ENAMEL LOC (Premier Dental Products Co.) is self-etching pit and fissure sealant. There is no separate acid etch step is necessary, cutting the application time and opportunity for contamination. The product is dispensed onto a clean tooth, allowed to remain undisturbed for 15 seconds, and then light-cured for 20 seconds.