How to force a factory reset or hard reset on DEXP devices

DEXP Ixion EL250 Amper E DEXP Ixion EL250 Amper E
DEXP Ixion X355 Zenith DEXP Ixion X355 Zenith
DEXP Ixion E240 Strike 2 DEXP Ixion E240 Strike 2
DEXP Ixion M345 Onyx DEXP Ixion M345 Onyx
DEXP Ixion E250 Soul 2 DEXP Ixion E250 Soul 2
DEXP Ixion MS250 Sky DEXP Ixion MS250 Sky
DEXP Ixion ES260 Navigator DEXP Ixion ES260 Navigator
DEXP Ixion ES450 Astra DEXP Ixion ES450 Astra
DEXP Ixion ES650 Omega DEXP Ixion ES650 Omega
DEXP Ixion X245 Rock mini DEXP Ixion X245 Rock mini
DEXP Ixion P350 Tundra DEXP Ixion P350 Tundra
DEXP Ixion MS450 Born DEXP Ixion MS450 Born
DEXP Ixion E350 Soul 3 DEXP Ixion E350 Soul 3
DEXP Ixion ES550 Soul 3 Pro DEXP Ixion ES550 Soul 3 Pro
DEXP Ixion ES255 Fire DEXP Ixion ES255 Fire
DEXP Ixion MS155 Coil DEXP Ixion MS155 Coil
DEXP Ixion ML250 Amper M DEXP Ixion ML250 Amper M
DEXP Ixion P245 Arctic DEXP Ixion P245 Arctic
DEXP Ixion E340 Strike DEXP Ixion E340 Strike
DEXP Ixion E245 Evo 2 DEXP Ixion E245 Evo 2